Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42dbb81b821d294…

MALICIOUS

PDF

80.1 KB Created: 2021-03-19 11:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1f726af0f60978201b9e29bfef320ab2 SHA-1: 236a2d5c0f2134a69e99b012924fb8ffd1f8696c SHA-256: e42dbb81b821d29462df4cf86f8fb7a3b796a1e398e25396a0aaf083db10bb39
126 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a disposable hosting service and a suspicious domain ('soxebez.ru'), suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to be a deceptive search result, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://soxebez.ru/strik?utm_term=what+port+does+openvpn+protocol+use PDF link annotation
    • http://fawikenaxalu.scienceontheweb.net/good_warrior_cat_oc_names.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/zewiwulejolaniba.pdfIn PDF document text
    • http://zuluguvo.iblogger.org/widiwirivitedixidil.pdfIn PDF document text
    • http://bugepugatoj.22web.org/skyrim_amorous_adventures_guide.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/70752277079.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/mini_dv_tape_player_deck.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaac6610-f9ac-43bd-8740-e7080886c1d7/83490993264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93908257-2bbb-4010-81c7-b502ecaada61/julius_caesar_play_cassius_quotes.pdfIn PDF document text
    • http://kesojavutuv.epizy.com/what_are_the_good_values_of_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6358608a-bcc0-43a4-a95c-03bf61cffa3b/john_the_ripper_example_md5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55656c6c-3161-4af8-adea-5063edc3b1da/levikiwonifoluvaruxoji.pdfIn PDF document text
    • http://livukizaxavubip.rf.gd/lilefozonuvobovokodibipi.pdfIn PDF document text
    • http://motitagododef.epizy.com/gymnopedie_no_1_guitar_sheet.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/zasara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3efdc14-2cde-4899-a661-1662d121b913/me_before_you_streaming_canada.pdfIn PDF document text
    • http://memezuxel.epizy.com/pneumatic_and_hydraulic_actuators.pdfIn PDF document text
    • http://xeravujowa.epizy.com/xosixomufibunin.pdfIn PDF document text
    • http://zigimavabixexib.epizy.com/57737295965.pdfIn PDF document text
    • http://ruxuvejefo.epizy.com/76454606672.pdfIn PDF document text
    • http://timosawudub.rf.gd/lagu_tertima_averiana_barus.pdfIn PDF document text
    • http://nevulera.epizy.com/xiwitukiwisotuzepixawa.pdfIn PDF document text
    • http://begosene.epizy.com/57774355910.pdfIn PDF document text
    • http://bevowamudad.epizy.com/flysky_fs_i6x_usb_driver_download.pdfIn PDF document text
    • http://lekipuvuji.epizy.com/cwms_4._0_upgrade_guide.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFF 5232 bytes
SHA-256: 37774be1a330471ffc02da86897b85cdd45f33620dc5ab211bbfcefb601c53e8
font_01_sfnt_off00010cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 11176 bytes
SHA-256: c72ed08ff8398da337871e2e7550941234e13631228698db519e6b95b96bccdc

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