Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ec59de6bf5c81f…

MALICIOUS

PDF

74.9 KB Created: 2021-03-21 21:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 79e80694d8f1e387ca9b01e537c863d0 SHA-1: 15454b788f6b590886ec30b51f52f863dc865bbe SHA-256: 73ec59de6bf5c81f724a40c97644dfee5bea1a23d411e6b47f76604488a0f97d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://gimoguvi.ru/123?utm_term=root+para+android+9+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449604/normal_6024050b73e43.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/hhcKgeI/7599473710.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/tagotofotarezodagosex.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/frgdiba/raspberry_pi_1a_pinout.pdfIn PDF document text
    • https://denibemexe.weebly.com/uploads/1/3/4/5/134597338/munokumenadelaxuxez.pdfIn PDF document text
    • http://fastpysystem.online/81990533470eds5n.pdfIn PDF document text
    • https://cdn.sqhk.co/jowibigodene/Njjhjge/xuxevafalosininut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_603c174e8abf1.pdfIn PDF document text
    • http://passive-income.ru/dragon_book_series_for_adultsjik56.pdfIn PDF document text
    • https://nanotobu.weebly.com/uploads/1/3/4/6/134638189/tajasefiwedib_xufuwarodijut_pejulak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fc9423fe49bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456982/normal_5fd1a9f5a66d6.pdfIn PDF document text
    • http://zinabexodepo.iblogger.org/vuwuzeporesupiwafitavo.pdfIn PDF document text
    • https://wafilanukeg.weebly.com/uploads/1/3/5/3/135309269/wuwobanivuxe-mekemupevo-kunozorolofax.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/4af3488b-7de3-4d3b-aec9-227341aa0281/the_heirs_episode_2_eng_sub_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f701de31-0da2-4e38-a88b-e6102ec273df/85144074812.pdfIn PDF document text
    • http://funazowo.rf.gd/bikedejusakutoleputepofal.pdfIn PDF document text
    • http://sijurajogo.epizy.com/zijan.pdfIn PDF document text
    • http://garopawugalil.rf.gd/link_s_awakening_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2323116-1820-4a0f-ac97-5f2510a4471d/q-see_camera_night_vision_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487fa91c-bdd4-44cb-b4a7-a18209250ffe/wrath_of_zombies_2_game_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bac4716-c283-494b-a0f4-0b0821566504/zowojugewetefopexudiz.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_off0000e8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FB 4972 bytes
SHA-256: 78245f618ed0af894f0b564bd11ae71ddaf62b539bc3ad1e43604ff0c561323f
font_01_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 10648 bytes
SHA-256: 8393dd53f85117b755fe361170fcf1bf6a6807199988a17c90b09e998fbb1e48

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