Malicious PDF — malware analysis report

Static analysis result for SHA-256 788f088d79d3151e…

MALICIOUS

PDF

79.8 KB Created: 2021-03-20 02:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7f04e46aade65acbfd0db2b079c04f79 SHA-1: 98309d4198bb7e7ee4568b1ca67f0c452f62cfb7 SHA-256: 788f088d79d3151e65107b73fddd8b1d8ae75e482f1d47ffbc166ad4a9e36d13
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 0.9993

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://zajinet.ru/wix?keyword=the+master+cleanse+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384851/normal_60483cb6e8b55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421049/normal_6032f1514de6c.pdfIn PDF document text
    • http://workbykoder.xyz/how_to_make_water_heater_stop_leakingt2rjb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5fd6649f84114.pdfIn PDF document text
    • http://tesar-krd.ru/28512587345qb49t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484370/normal_60124209e2d9c.pdfIn PDF document text
    • http://item-mask.top/64277567388rh79u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_600fd554ab982.pdfIn PDF document text
    • http://nudistoff.club/juwavejaxelosuloluxajovow2s3nh.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/sekiro_shadows_die_twice_gamestopf9fic.pdfIn PDF document text
    • http://rogumim.iblogger.org/pelogaxa.pdfIn PDF document text
    • http://asia.kiwi/wowwee_robosapien_x_chromew6bu4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_dc9fea3269144281b825ebe3e3f29315.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/xixes.pdfIn PDF document text
    • http://mabagojovas.epizy.com/21287136299.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_1454bbc9cf2b460fb6babebb7e1205d3.pdf?index=trueIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_e23e969bb7d44c548bb6f44aaa004ee1.pdf?index=trueIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_57ab1190ec8b488fa77f0d8336da72e1.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_573ebb9bc835483bbe18fe20d740e548.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/sixebuvugikom.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/58320909533.pdfIn PDF document text
    • http://fufezexu.epizy.com/52711352718.pdfIn PDF document text
    • http://bezopebadutaz.rf.gd/benchmark_my_laptop_performance.pdfIn PDF document text
    • http://musizaxodolof.epizy.com/how_to_fix_my_biddeford_blanket.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_off0000f79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79F 5556 bytes
SHA-256: 2f17a479afbbcd074f0db9c7ddc8a0d9ca8af97d2443c0db2780e4027971be6c
font_01_sfnt_off00010a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A10 11636 bytes
SHA-256: 3e261093fb1b38ce9f08d2755b9ebad3a0de888b003a94a6c53a82e1fc3b401f

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