Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc7b8d14a614ede…

MALICIOUS

PDF

78.7 KB Created: 2021-04-30 06:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a2e552aaf36d0f6579d40ac2c384cd67 SHA-1: 2c096e0c424015c97b006c87ae7d833c82f802d4 SHA-256: 6dc7b8d14a614ede4e889282607b556ac29b189f0271844d7fa03e896c7360e7
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 0.9998

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://crophysi.ru/strik?utm_term=norse+creation+myth+name PDF link annotation
    • https://tigewatujuw.weebly.com/uploads/1/3/0/7/130738543/gafatejusunisid-jinogupusuparat-vokaw.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/afdedf28d01e12.pdfIn PDF document text
    • https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/b8fd3c60.pdfIn PDF document text
    • https://bokoxopeke.weebly.com/uploads/1/3/4/2/134266118/88f5c0e.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/ea3a6ec95.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/hijih73/hello_all_you_cool_cats_and_kittens_meme.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/putipegavabagi-selerig-wigadi-vosokesojew.pdfIn PDF document text
    • https://jelezasi.weebly.com/uploads/1/3/5/3/135347821/35c72d376566a.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/cambridge_checkpoint_science_book_2.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/arms_reach_cambria_co_sleeper_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwatak/jajifig/2973502406.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/mjimv0T/tenitukuwe.pdfIn PDF document text
    • https://kuvolobogon.weebly.com/uploads/1/3/4/0/134012650/nazufulu-zosot-rudixewaronij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumazudu.rf.gd/39400471705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2998b93-89e0-422c-b8a3-87b276afe683/brandon_lee_death_video.pdfIn PDF document text
    • http://fejivexol.epizy.com/81713901302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548ed7f4-582b-4838-a092-5adf649334cb/family_tree_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266cf4d3-a507-4e24-b449-53d7bbb6501c/death_note_lyrics_boy_band.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/arch_linux_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f369be-3809-4a6a-ab6e-a012f421d35c/merchant_of_venice_act_1_scene_3_all_questions_and_answers.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E7 5076 bytes
SHA-256: 8689cbaf9814f65d162156e8b2d5a7e0c958075147c3a3a48b0df6e6ffd71c1a
font_01_sfnt_off0001080d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080D 10780 bytes
SHA-256: a7403fbb207f3e8b483bf1585df730191266ee7843de6a04609baa6787b2bcf2

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