Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f987294cdc81d3…

MALICIOUS

PDF

85.4 KB Created: 2021-04-06 04:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cd9ca5783da3602e4b6fff918b30fb23 SHA-1: 15f11d05822eec45a735c4cb2fbd9a0299bed969 SHA-256: 14f987294cdc81d317f11b2d8af607b4f49b36a4a6d72e03ba899eb77cf51ab9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to obscure the true destination of external links. The document contains numerous links, many pointing to disposable domains, and is likely intended to deceive users into downloading further malicious content or visiting phishing sites. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/aws?utm_term=drugs+society+and+human+behavior+17th+edition+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374979/normal_5fdea7eb7ce9a.pdfIn PDF document text
    • http://kartaidatodemeleri.com/senimanelolutitevuzifufe98gua.pdfIn PDF document text
    • http://power-guard.shop/jijoditijhv8lw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_6052fbb3f13f5.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/4880177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494875/normal_604703d4bd158.pdfIn PDF document text
    • https://wepidunobon.weebly.com/uploads/1/3/1/4/131452842/049790ed912639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403937/normal_605ff0365db55.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/281c850bd015.pdfIn PDF document text
    • https://sadavofabuloxus.weebly.com/uploads/1/3/5/3/135316226/3236325.pdfIn PDF document text
    • http://pycnidwzxc.info/cards_against_humanity_decks_xyzzytppkj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_6011d53d4af1a.pdfIn PDF document text
    • https://rukutatonaneto.weebly.com/uploads/1/3/4/0/134012616/504157.pdfIn PDF document text
    • https://kupifima.weebly.com/uploads/1/3/0/7/130775493/buruwa.pdfIn PDF document text
    • http://cyberghost.store/dagosuzo6iy7i.pdfIn PDF document text
    • http://activa-fb.com/wuleteguvulitwse86.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/cb2f8ba68f758a.pdfIn PDF document text
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/2452004.pdfIn PDF document text
    • https://mafaredoli.weebly.com/uploads/1/3/2/6/132695491/jakomowagojilav.pdfIn PDF document text
    • http://copyright-services-us.com/zabukiwojugia4tuc.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/jaxufudame.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
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_3979ecb0797a42fdb9170e2b05b867e9.pdf?index=trueIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_c1c3d1f3ec0e4fa9be81145358669086.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_95f992d56bac46e8b224b0b32f059896.pdf?index=trueIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_9a1bd56f1cf8404cbdd5a59e290478e8.pdf?index=trueIn PDF document text
    • https://9c3086b9-336b-4a4d-b39c-975a2563a2e0.filesusr.com/ugd/f4f792_ddd2cff74378403bb3b0a1f79cd8c394.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 5976 bytes
SHA-256: 9afc0fd33eeadee230846aa3a38d1ec4d07e304b3de26363b01baf430e231bbb
font_01_sfnt_off0001123e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123E 11092 bytes
SHA-256: 801b5bd398df7200afc3b2dd54ee1a2494c0cd514541575ce3e72a67812715a9
font_02_sfnt_off00013791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13791 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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