Malicious PDF — malware analysis report

Static analysis result for SHA-256 81904b6014be2683…

MALICIOUS

PDF

76.8 KB Created: 2021-04-01 08:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: df420c2bb77662b6701bb0b01924512f SHA-1: 8601120256ec5de37df1d2db28cbbeff42512850 SHA-256: 81904b6014be26836dcaf85e11bec918505bfdabe00b9e2d50606a50aa57829f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://bologen.ru/123?utm_term=minecraft+dry+hands+sheet+music PDF link annotation
    • https://cdn.sqhk.co/ninuxoti/eWU9Oiu/bagemilizaz.pdfIn PDF document text
    • https://fejevudud.weebly.com/uploads/1/3/2/6/132695511/7694248.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/38882356622.pdfIn PDF document text
    • https://xuvurabog.weebly.com/uploads/1/3/2/6/132696285/nojalajatofogu.pdfIn PDF document text
    • http://debuged.mywebcommunity.org/canticorum_jubilo_handel.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/djcjbPr/traxxas_link_app_manual.pdfIn PDF document text
    • https://talidifixuj.weebly.com/uploads/1/3/5/3/135390844/ranexamuku.pdfIn PDF document text
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/mifonozuxuvel_sizafak_vixavejubo.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/339e310e-1db0-4b5f-9293-306a395d9dcb/48834026911.pdfIn PDF document text
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_ec0f406993e64bfe952d1fabd35132ed.pdf?index=trueIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_5583b37fd2f74ce6a45669cdd918676a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidivo/sogerefudibumese.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_7955a96b038546aca1936dc9e0b8c34e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/18064689665.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/doxapafelugumibeguwesip.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/rowdy_baby_video_song_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/how_to_do_things_with_words_free_download.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_c3340dcdd95f4dcb90a58c5880673609.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d6bc6a-cc1a-46e1-9601-908593805da3/9659118994.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_off0000ed5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5B 5336 bytes
SHA-256: e8eae175335c89e00e3725626762e4290fc5e854f20b6b023fd096014ab9a01a
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 11432 bytes
SHA-256: fc08af4f095551571fe8bf7ce967041c6f8d3559ead6e74815251ddf26b06ad6

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