Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6e0424ddfe5d08…

MALICIOUS

PDF

69.5 KB Created: 2021-02-18 19:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 93b1c41028807a917325979ec9886707 SHA-1: e1602d319f52ba9ad199411816b8e3ffd5ebabfd SHA-256: 4f6e0424ddfe5d089da33b0db80cafb0e50b6f2503a6b51ed7a6c6a026183477
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL 'https://maypoin.ru/wix?keyword=war+robots+hack+without+human+verification+or+survey' directly advertises a lure for obtaining game cheats, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=war+robots+hack+without+human+verification+or+survey PDF link annotation
    • http://rapisakaxo.66ghz.com/lulelanux.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/heLxb5R/survival_craft_apkpure.pdfIn PDF document text
    • https://mebotorafegamor.weebly.com/uploads/1/3/0/7/130739377/lojerojutiladegar.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/a5244dfc77fc5.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/gggjhgR/vipigidiviwosobow.pdfIn PDF document text
    • https://cdn.sqhk.co/kedetofido/gbijLid/tubokojaziboteburitom.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/aji0hae/7529802220.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/jTjfhi9/republique_dominicaine_voyage_leclerc.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/hdheoij/space_rpg_3_ships.pdfIn PDF document text
    • https://cdn.sqhk.co/kosuxatune/cijidig/gerigilewosore.pdfIn PDF document text
    • https://setupazaz.weebly.com/uploads/1/3/4/7/134772318/votij-vaguz-zaresinu-nubepuvapada.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/469ea5b0acd7a1c.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/jh0TfAc/amazon_griswold_christmas_village.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/jeOxQie/simple_social_media_calendar.pdfIn PDF document text
    • http://refoxedij.iblogger.org/xaguzepakusolo.pdfIn PDF document text
    • http://nexusisuperat.22web.org/gezozigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wimidisa.epizy.com/95336263938.pdfIn PDF document text
    • http://tuzekejaxegis.epizy.com/zofes.pdfIn PDF document text
    • https://tinyurl.com/ybjb486cIn 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_off0000c886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC886 5560 bytes
SHA-256: 072fcd16226835dbcdfc1affe14344cf938cdc21307ffa3a7c7770bafd64ecea
font_01_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off0000e504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 10272 bytes
SHA-256: dab3f43467506d7ca9dff908bedc2b4ccf3e7b997e32c7e9e64b5ed70ee310c7