Malicious PDF — malware analysis report

Static analysis result for SHA-256 214c4a754e2c3e35…

MALICIOUS

PDF

83.0 KB Created: 2021-03-21 02:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9e9d09755cde6746a42e06aff3f7af8e SHA-1: 1843a044dd60f89e885f8c904105c95951f19654 SHA-256: 214c4a754e2c3e35384a48b0f907214050008118a69ffd735ba10310235ebb21
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://seumenha.ru/wix?keyword=download+kingroot+apk+for+oppo+a37f PDF link annotation
    • https://cdn.sqhk.co/bisuligiga/i9w34Ca/73375868342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_601ef0dbe5ff4.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/67iaaCx/92621809409.pdfIn PDF document text
    • https://cdn.sqhk.co/xawowatu/gegfMgi/speed_logic_lite_apkpure.pdfIn PDF document text
    • http://volosaty100.xyz/sugar_lyrics_flo_ridaxsllw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465133/normal_60501f3c13069.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426422/normal_5ff66f8220022.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/bokofutexonasagurenomubuw.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/TtgiibQ/injustice_superman_vs_world_breaker_hulk.pdfIn PDF document text
    • http://dvestideyli.xyz/small_dutch_tool_chest_plansegj1b.pdfIn PDF document text
    • http://autolombardpro.ru/tobitatubavof500x.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/5igelKD/england_football_world_cup_winners_2017.pdfIn PDF document text
    • http://ita-bio.fun/90255659777rp4hx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuponefi/kalphite_king_solo_guide_2018.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/toxoplasmosis_veterinaria.pdfIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/allen_carr_easy_way_to_quit_smoking_audio.pdfIn PDF document text
    • https://2bb9e989-9ce9-409f-aa8a-839f2ea8d3bf.filesusr.com/ugd/9f8cc2_e7b91be4a2e2460f9525be2c6f54ef60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/chitral_somapala_songs_free.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_3a1fb8d62712425093cb335957f4ec2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/gebigazedexadejo.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

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_off0001042b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042B 5428 bytes
SHA-256: 8a2820252b6399384a635d2a0a1eb2e57107d34412b9d784ca309f9af2bc902f
font_01_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 11788 bytes
SHA-256: 4a233d488bf3ed9683e934ea34db197033e063b1013b040bcc9ef7118c62957f

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