Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee8bb5bd59a7a6b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-10 03:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 30ad42cda8c23580cf9b920dca7d8054 SHA-1: 5387f451188f919f86c8cc57bc44b27bc0e560c3 SHA-256: cee8bb5bd59a7a6b0e1033bb68ef2f2887fc068cb60a9f8328d45845af6ec80e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/123?utm_term=zoom+crystal+report+designer PDF link annotation
    • https://cdn.sqhk.co/zubavagi/ihgijhj/safety_first_forward_facing_car_seat_installation.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/ge0Niaj/together_family_chat_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/ER7jhgj/11868454348.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/zjhUSic/57633728459.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/jihjCjh/ninja_raiden_revenge_mod_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kazakilen/dhighiJ/mukixowawoberafaw.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/4UT1au3/grow_zombies_mod_apk.pdfIn PDF document text
    • http://beautysss.site/what_are_examples_of_listening_skillsxanr4.pdfIn PDF document text
    • http://ru-payment.casa/276720709719e0hh.pdfIn PDF document text
    • http://vkysnaya-eda.site/65582645478g7xsc.pdfIn PDF document text
    • http://becloud.website/nipofufajopovoliwowego1dzm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e71d180a-e392-409c-96ef-9f1427cf0970/option_trading_books_in_hindi.pdfIn PDF document text
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_cddc8d84b6e543f6bef35e7d2592267e.pdf?index=trueIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_0fef614c0e0b419da41d4751d9946cf4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7220eb3-a599-4dae-b63f-e704ab7ea1a6/refedimejatuwesodadenif.pdfIn PDF document text
    • http://bubijijesaxo.epizy.com/todufisaresoduxobizupe.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_4c5bc317e11f4fd7894b142c8d0b9fb4.pdf?index=trueIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_2795ce671f534699bb54d8f1c68bbef8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/971ab03f-13b3-44b7-bb05-d9015ed8bd90/fikutekif.pdfIn PDF document text
    • http://sosasofojatage.epizy.com/s_letter_video_telugu_songs.pdfIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_52d22ecf37d143f598a895d82deeed49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4235dca-35fc-4b39-ab2a-c1821e383c6c/22032042667.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/15430033303.pdfIn PDF document text
    • http://xuwomotibinifen.rf.gd/navien_npe-240a_maintenance_kit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 5240 bytes
SHA-256: 3d0cd4002f20aee1a462b2e3e331f74c2bf9157429cc3b39b9e377150f3152a3
font_01_sfnt_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 11532 bytes
SHA-256: dab3915147a0321012c641dbbe35dbaaf9f6a84636f983846caf7f17de465485
font_02_sfnt_off0001212d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34