Malicious PDF — malware analysis report

Static analysis result for SHA-256 3162a94a72bcef68…

MALICIOUS

PDF

81.8 KB Created: 2021-04-25 09:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6fa3bf8abd8fa5d71697739118598200 SHA-1: c79741d7f67edfdd47f0437f18a4ea8c28505716 SHA-256: 3162a94a72bcef68e534e6e74b8a33214cac5f6e7d247df90a0bf43d43e76896
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs pointing to disposable domains, suggesting a link farm or phishing infrastructure. The document body, though heavily obfuscated, appears to be a lure disguised as a recipe, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=how+to+make+el+pollo+loco+pinto+beans PDF link annotation
    • http://fesotisifofil.mygamesonline.org/60387955239.pdfIn PDF document text
    • http://trixy-matrix.space/xowezekibigiwujuvub7b0hs.pdfIn PDF document text
    • http://milanbeachs.space/nipepusobekozoribikekeojnwe.pdfIn PDF document text
    • http://bitjoms.xyz/golden_song_lyricsy4212.pdfIn PDF document text
    • http://modernstyle.pro/latifokijebuxezinazexufk3bpg.pdfIn PDF document text
    • http://karaulovlife.site/casio_vibration_alarm_watch_pricegkh4b.pdfIn PDF document text
    • http://clientesdkb.com/zajojomuzinepugusalujazupxlpn3.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/19723157746.pdfIn PDF document text
    • http://game-pro.xyz/dejebemavezipuwuximowigevpiv.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/marantz_sr5007_review_what_hi_fi.pdfIn PDF document text
    • http://doctorzlo.com/zupazuxejikufimv8se5.pdfIn PDF document text
    • http://namedaun.fun/forex_trading_strategies_free_downloadyig7z.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/f72fd52a-6344-46a2-95d1-52c423f8ff34/unlimited_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cfa645-a715-4c72-a4ee-226eb6524165/glacier_bay_pull_out_kitchen_faucet_replacement_hose.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_22177b8223be44378f791c1edb031560.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/13681905830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4efeb8d4-3983-4af1-b3fe-3e348c58ee33/lexus_rx_2020_vs_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/e-_math_9_answer_key.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_edd70a430927462a8137cd5612abbe79.pdf?index=trueIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_12aff521946e482c9f2891e608366148.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AC 5240 bytes
SHA-256: 50000a66c14a0f1089bb469fa06d1f1b741521854c27a19fb1541396896d9ef6
font_01_sfnt_off00011371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11371 10824 bytes
SHA-256: 9e3b21a91f2dfcd459fedf44cbe8b5176a435364bd0af9b53c27007e3e77f995

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