Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9987a8d643093f…

MALICIOUS

PDF

85.7 KB Created: 2021-03-08 15:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9a21833d389d866cbc71aa62f0436349 SHA-1: 32de5e053801c2be3488032068b02c9905407278 SHA-256: 3b9987a8d643093fb18f309e798b3883d4ce925379c386ca17fadcc3ab438098
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://midufefew.ru/strik?utm_term=which+wagner+flexio+is+best PDF link annotation
    • http://wiwajekirutiw.scienceontheweb.net/tax_administration_act_tanzania.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/ralisolexivedefosu.pdfIn PDF document text
    • http://itchia.space/ribimimipirm6ai.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/68170701966.pdfIn PDF document text
    • http://leopolds.space/dotovarunab367de.pdfIn PDF document text
    • http://gofesirukuzud.22web.org/this_sex_which_is_not_one.pdfIn PDF document text
    • http://palupalukagu.mygamesonline.org/pokemon_tcg_online_iphone_reddit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wokobudedisete.rf.gd/munson_fluid_mechanics.pdfIn PDF document text
    • http://womagemav.rf.gd/does_usps_forward_mail_internationally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c7d44b-d6de-4de7-9f39-d68a8655511a/magesowadoxej.pdfIn PDF document text
    • http://zesositug.epizy.com/60645078705.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_2e51cc183dca4a6581601761c0ccc288.pdf?index=trueIn PDF document text
    • http://gigapenawer.rf.gd/compressed_sheet_mask_adalah.pdfIn PDF document text
    • http://fepesori.rf.gd/95542099884.pdfIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_2e4ee5af845b44eeb1b35d1105401a4b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9cd3bc-cb1b-4fe1-a31a-6a06e8835382/jibebe.pdfIn PDF document text
    • http://nerusejide.rf.gd/nifovobawoxake.pdfIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_4793ef6a6c5841a0b33d29299661b6c8.pdf?index=trueIn PDF document text
    • http://zasexizo.rf.gd/afghanistan_calendar_1398.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/darunuxujijipel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 5244 bytes
SHA-256: 8c4f315ece6892d78e880a4de73274018357c44c60f22f9d7f327fc1ec35a975
font_01_sfnt_off0001162c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162C 10784 bytes
SHA-256: cfe30b7b4c3d334b26e0890eae37d256dc5d2a6969d5d62a1a979b482d900219
font_02_sfnt_off00013b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B10 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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