Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9ecc84c7e85343…

MALICIOUS

PDF

143.2 KB Created: 2021-04-02 23:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6ee718fc7f2ae0c758fc0f669ee1a6fa SHA-1: 44700a033ee69e4e1d9c420209c05f4b455e5618 SHA-256: 4f9ecc84c7e85343d593a5c69d0c471a159bae73ab0af7613255415cfe729997
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, and heuristics indicate it functions as a link farm. The presence of a 'download button' lure and the embedded URL suggest an attempt to trick the user into downloading a secondary payload, likely malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9214

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/wix?keyword=imei+tracker+apk PDF link annotation
    • https://rixafivi.weebly.com/uploads/1/3/1/3/131380000/4807350.pdfIn PDF document text
    • https://butafujedixixi.weebly.com/uploads/1/3/4/2/134236167/7b13382043ca.pdfIn PDF document text
    • http://santecmb-sarl.com/what_vegetables_to_avoid_on_candida_diet7a8t5.pdfIn PDF document text
    • http://gamoseromugod.22web.org/mewumakage.pdfIn PDF document text
    • https://teduzagegoxow.weebly.com/uploads/1/3/4/4/134400331/vavedetesimub_tegawejafugu_girosagi.pdfIn PDF document text
    • http://it50save.info/el_alquimista_free_downloadp211s.pdfIn PDF document text
    • http://idealicait.website/push_and_pop_operation_in_javascript76c2f.pdfIn PDF document text
    • https://navubepoma.weebly.com/uploads/1/3/5/3/135394012/b298fa32ce4.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • http://dream-stat.ru/dawiboxizor8frti.pdfIn PDF document text
    • http://deromgroup.com/cisco_dpc3008_link_light_blinking_orangeu20z7.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/rjciihc/15703830198.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/abbayi_class_ammayi_mass_video_songs.pdfIn PDF document text
    • http://bullbananavannaone.xyz/duo-therm_thermostat_installation_instructionszafok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://roxudafemif.epizy.com/73474694502.pdfIn PDF document text
    • http://veziledijiv.rf.gd/werbung_blockieren_auf_android.pdfIn PDF document text
    • http://robexede.rf.gd/how_do_i_know_if_my_salt_chlorinator_is_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef0ea51-01d6-49ac-96e2-4f3c8a0ada70/girlboss_sophia_amoruso_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb06bb40-ac0b-4c0f-b5d7-ce07b7fd7ead/samsung_galaxy_s5_price_in_pakistan_second_hand.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off0001f321.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F321 18780 bytes
SHA-256: 0131e3521ff58303f526070f42615d1a704986d63592f622d88acdd0eb3b5eb0
font_00_sfnt_off00016135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16135 6440 bytes
SHA-256: 705377623a4c4344e02470fedf876d1ed6f0c7c0eac322cafb15afc9430d14bf
font_01_sfnt_off000170f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170F8 5856 bytes
SHA-256: f4996c9e62ad34121a3fadb6c699cd49203a10309fc74df82bf8e0384575ca50
font_02_sfnt_off00018560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18560 4444 bytes
SHA-256: a3e49d5540487abc6ccf6e9f84e07308feef8ba5119487c1e9e967a9cbe60c7a
font_03_sfnt_off00019461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19461 5700 bytes
SHA-256: fe934df80a5facf2522d05c3a8c4e706b70a3c2ff1af5b845679b3fc7ea0a515
font_04_sfnt_off0001a5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5BC 2772 bytes
SHA-256: 551cc38ec71001cc712f331adcee1230938e61d93f4247608b25780409906a86
font_05_sfnt_off0001b196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B196 6148 bytes
SHA-256: 0b8363bc9e07cf89205331d27bc1c31e4fc91592bb846ce71245372e642e4983
font_06_sfnt_off0001c176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C176 16432 bytes
SHA-256: a337bfd9099575d123c0dca51035b5a1fb6e8bfc0255f5d59b806203be6270f7
font_08_sfnt_off000210ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x210EE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
font_09_sfnt_off00021ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21EF8 3248 bytes
SHA-256: e9dd7124a399f0df0a4c85d08182d31bb088fe5cded375f3a76f777e375800dc

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