Malicious PDF — malware analysis report

Static analysis result for SHA-256 64075c977196a063…

MALICIOUS

PDF

74.9 KB Created: 2021-03-26 06:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a93db809005aec443d3f77fedb1cad5f SHA-1: 9093ec7298558e5ebba5d5a193b1532181f73bc4 SHA-256: 64075c977196a06327d7b4c7d0f84bcbf39b1dc499d99b3d872dbc5c77f54e15
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 0.9991

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://ponafet.ru/wix?keyword=teaching+transparency+worksheet+answers+chapter+5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423189/normal_6051aa2b3e3db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499656/normal_60116e08c78b1.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/dhejIic/36888067941.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/5855778560179koj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6033629fcb7fe.pdfIn PDF document text
    • http://istra-backwater.ru/xiniwevafeguboretuwolagwuab.pdfIn PDF document text
    • http://lightsex.ru/60584822811fqf9z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_6016f701cdfff.pdfIn PDF document text
    • https://toxosujaduwo.weebly.com/uploads/1/3/0/8/130874389/fimofejaz.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/xoraloso.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/dojjD9M/bulaxufujazerador.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_6020013ac48b6.pdfIn PDF document text
    • http://geekcods.com/gigizuxadetukamexepaxezen9yic2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425772/normal_6036a4eb5509b.pdfIn PDF document text
    • http://doorstepcomputers.com/zifefenogulezowobyasr1.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/1Pohgje/hot_skater_boy_names.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/lofosorabamu.pdfIn PDF document text
    • https://cdn.sqhk.co/puroneruk/bhbibjd/islamic_ringtones_free_download_app.pdfIn PDF document text
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/rimoxebokafemetanus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403263/normal_5fed6a8751069.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/jjdOhj6/74502818948.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/2808459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fe2a3c3c8cf2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/jesus_at_the_center_chords_key_of_f.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_off0000e45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 5492 bytes
SHA-256: a10a94de0cb6e5d9f556050a7c598f82b39909174cfee94f94145858adbd29d6
font_01_sfnt_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 11408 bytes
SHA-256: 1b75de21fdb76faef1deb6c09a700fb1c451c03cffb6afb6042731242cdc32ac

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