Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dc0901f4f46b26…

MALICIOUS

PDF

69.9 KB Created: 2021-01-18 18:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf1a1eac39bd35709cdfe505e33fc01d SHA-1: 762fa72b67f240dca1460766c9e7448b9843365c SHA-256: 32dc0901f4f46b2617f23d9af7bec5ab4ec5f3792dd1ccbb2807a3032bb9788f
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to various PDF files hosted on external domains, indicative of a link farm or SEO manipulation scheme. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected the file as a phishing trojan. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=islands+in+the+atlantic+ocean+map
    • https://cdn.sqhk.co/kixituvelil/hagj4hj/uphill_rush_3_unblocked.pdf
    • https://cdn.sqhk.co/todusukiraxi/Mjegdic/candy_frenzy_free_download.pdf
    • https://lefawiput.weebly.com/uploads/1/3/5/3/135324435/ed9a739ce6e.pdf
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/mowaminolexabisupij.pdf
    • https://gidepezugubuwo.weebly.com/uploads/1/3/4/7/134766768/gifurupexepubena.pdf
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/aed33f009bbcdbb.pdf
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/5095099.pdf
    • https://cdn.sqhk.co/mivijigonof/giigdMN/birdy_skinny_love_lyrics_ubersetzung.pdf
    • https://cdn.sqhk.co/sobupepokor/lji48gj/nerf_zombie_strike_sledgefire_blaster_review.pdf
    • https://dopupuwupexiro.weebly.com/uploads/1/3/0/8/130813117/9397444.pdf
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/1423306.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bowupezik.epizy.com/diferencia_entre_aprendizaje_cooperativo_y_colaborativo.pdf
    • http://mogerokefo.epizy.com/asriel_dreemurr_fight.pdf
    • http://bamalupit.rf.gd/lovedrobe_dress_size_guide.pdf
    • http://tirevotijo.epizy.com/kekilutapik.pdf
    • https://s3.amazonaws.com/lososimap/72298852795.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d35f.bin
9f0abe605f3e4d510c37b2cb54168e8f7252c8b71400acd0ee48eba59bb81979		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD35F 5156 bytes
font_01_sfnt_off0000e4c1.bin
16817486d5fc010aaafc9058017d3fef458a0df5df8f968b830a563dad1f29d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 11616 bytes

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