Malicious PDF — malware analysis report

Static analysis result for SHA-256 9875c31652cea715…

MALICIOUS

PDF

76.9 KB Created: 2021-04-20 10:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 56f6e89331dafb441054a1bc3beaa00f SHA-1: 72b89a7bdf57629830c0f724ec00405322db866a SHA-256: 9875c31652cea7154efb3ae06d8fc2c3b0df16a8abd5b4fc8cfa6a79dd6f127f
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 0.9996

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://zajinet.ru/strik?utm_term=max+lucado+church+san+antonio PDF link annotation
    • http://olivamebel.com/single_player_card_gamest9wx6.pdfIn PDF document text
    • http://moneyindia.site/tafebegefadevetem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501963/normal_5fd398a16e28a.pdfIn PDF document text
    • http://hisgohar.site/curriculum_associates_llc_answer_keymqk91.pdfIn PDF document text
    • http://prodson.fun/duperegupupokodatevoxus0x4q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_603c78fd86c07.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/nuzirexovajafox.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/bogoshipda_piano_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_60166821d991a.pdfIn PDF document text
    • http://classkaod.ru/2167898319srnab.pdfIn PDF document text
    • http://faceit.su/tesuramelopaditatobarigzvdk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_605fb888553b8.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/3587890131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_6018423de719b.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/bacd31f3-c927-422f-95ee-da0446530d26/64452680263.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_7b05d4f6179242a1af5457995c615b90.pdf?index=trueIn PDF document text
    • https://2b01876c-5741-4e94-bfb6-30973e4a6517.filesusr.com/ugd/45d688_1f4fdee2a0af4d069194f9f5261d1f0f.pdf?index=trueIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_22ab336cff0047e987a9e1462b59f53b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/80c6f6ea-5063-46ab-9dcd-c7a56fbc45c6/logobetabar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c814dc19-39cb-4a04-ac0a-7420b6d7026f/15591975383.pdfIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_ff16fc8f86bc4a07b89f631ccb3f27b5.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_107d117f778b448bb6d9c0b07d9d2468.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF105 5100 bytes
SHA-256: bdd7db0bd5f8c1fe834b0818c969af3489f6ea366214cfb7677bba74b3656a04
font_01_sfnt_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 10564 bytes
SHA-256: c7cff6ca48d8dbdeac00f0a2c05d296afe0da4403341ef011acbc643dca7ced9

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