Malicious PDF — malware analysis report

Static analysis result for SHA-256 788d8611a2026fc8…

MALICIOUS

PDF

68.6 KB Created: 2021-03-08 18:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ab33cfb0b243c46a26f02fd55ad10d76 SHA-1: def3600919895c5cd5d108e241c6cc6cc7efddda SHA-256: 788d8611a2026fc8deaf89858430eaf4b2b994d1c5106322f592fd835ac128cd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on low-reputation hosting. The primary URL suggests a lure related to a strategy guide, likely to entice users to click through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=kingdom+hearts+3+official+strategy+guide+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408989/normal_600a6ed54fd5c.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/wolf_gas_range_oven_stove_ignitor_igniter.pdfIn PDF document text
    • http://dragonflysagewellness.com/kudapakajasomimopazugzlj9f.pdfIn PDF document text
    • http://my-favshoph.online/601285112850i3x4.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/70417263266.pdfIn PDF document text
    • https://zizujegaduxopur.weebly.com/uploads/1/3/5/9/135972979/nagidijixiwal.pdfIn PDF document text
    • http://wownatural.fun/36642402573x18t6.pdfIn PDF document text
    • https://lufegema.weebly.com/uploads/1/3/4/1/134132410/tejugejakuji_nagajekadakukaf_baxaxumesolere.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/zoniwajuzavolarirewewixu.pdfIn PDF document text
    • http://goodik.fun/what_is_the_role_of_plc_automationfxwvv.pdfIn PDF document text
    • http://fullhp.info/download_higher_by_dj_khaled_ft_nips5ryb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_60412bbc00378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_5fd7cd92d4828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412899/normal_5fe20b43c9775.pdfIn PDF document text
    • http://wejnpowk.space/271799552663w2aw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_6002c5dbe5b06.pdfIn PDF document text
    • http://changepass.online/9685482621oj1ih.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenexunir.epizy.com/what_is_the_crying_game_song_about.pdfIn PDF document text
    • http://zesivukawavomu.rf.gd/google_chrome_adobe_flash_player_download_failed.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/37580774188.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/7064550489.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_off0000ce84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE84 5876 bytes
SHA-256: dbf41978e43e30f329d99154fc7afcb11426002ed6c46fa8308485ad6a61803b
font_01_sfnt_off0000e267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE267 10152 bytes
SHA-256: 351fcc47dcad119795d9d93cd917e4d3353a67598d472a2b93ace006d6a3e57f

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