Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe794b1048d27a1…

MALICIOUS

PDF

79.4 KB Created: 2021-04-02 09:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c6798a42f3c1176fa0498671332ae12 SHA-1: 36ad5870f6268a9918ca93b5fe4aa580b24b09b1 SHA-256: cbe794b1048d27a16f5f7389ba5caf13b9d5920ce86cf9ca4af0e759e8ccc3d3
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 0.9992

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://golowaki.ru/wix?keyword=deuter+guide+35%252B+pack PDF link annotation
    • http://lazategomid.scienceontheweb.net/how_to_rewire_a_sprinkler_system.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_5ff1348303408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_60250763770b1.pdfIn PDF document text
    • https://novigavaze.weebly.com/uploads/1/3/0/8/130874354/zupexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_60321aa53c60c.pdfIn PDF document text
    • https://fatilisuwojumo.weebly.com/uploads/1/3/4/6/134652656/7822734.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/9964b5d40553a.pdfIn PDF document text
    • https://dokakuzod.weebly.com/uploads/1/3/4/8/134884054/9216092.pdfIn PDF document text
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/waluzavirakaju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373998/normal_5fc6982b34faf.pdfIn PDF document text
    • https://linikakisevokeg.weebly.com/uploads/1/3/6/0/136098208/kigukefuj-fudoridudibi-fojebinasuri-dagumenigugojow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461250/normal_60252652916f2.pdfIn PDF document text
    • http://fedexonep.mypressonline.com/jitawatizaj.pdfIn PDF document text
    • https://dupivujo.weebly.com/uploads/1/3/4/6/134612497/regamixatujun_malemurusalu_xitaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_6031cdafc2b70.pdfIn PDF document text
    • https://ditoleruv.weebly.com/uploads/1/3/5/3/135345680/22b2a3ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414677/normal_6005dc850e631.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/1773073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_605d4edd3a283.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/gotenukevepunin/weather_fronts_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/36418919410.pdfIn PDF document text
    • http://xasagode.myartsonline.com/munokemevidukulove.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/100_deadly_skills_the_seal_operatives_guide_to_eluding_pursuers.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_off0000f76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76E 5380 bytes
SHA-256: 8806a85475365e326d932300a0bfccb38b73c5ec7fd7b7fdee4cfc4eebb2f46d
font_01_sfnt_off000109d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D9 11252 bytes
SHA-256: 2d2f055f55774e1d7e7ca376322696386305a2fe2d0f42ff46ae2b03ffa6c528

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