Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a22a97474cf672d…

MALICIOUS

PDF

97.6 KB Created: 2021-04-01 20:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0c652b1ee978683f7c2316fb261ccd7f SHA-1: 9fde72ebf699a5e339772db5b92aa4bee2cdcdf6 SHA-256: 5a22a97474cf672db4d611380e5e550d273776788919c234dfd500fabad7f14c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=lock+picking+set+cheap PDF link annotation
    • https://cdn.sqhk.co/befulirawid/lgfkhdH/chef_s_choice_615a_manual.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/givalexijosum.pdfIn PDF document text
    • https://nipibodofabujid.weebly.com/uploads/1/3/4/2/134265940/tozamamodaruf-xebesiz-fasafeli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_600790a68637b.pdfIn PDF document text
    • https://zurukonovode.weebly.com/uploads/1/3/1/3/131379219/2249307.pdfIn PDF document text
    • https://cdn.sqhk.co/nefijisob/fehacjc/53122546015.pdfIn PDF document text
    • https://cdn.sqhk.co/barosevarega/geBibIa/zemunuwokatoliju.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/jiyhitT/mebixefatitogaramoxoper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_603e91d882c4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_604af3a5eedac.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/dinurixuped.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/Ggf0Tji/vedakabukewurivupuk.pdfIn PDF document text
    • https://cdn.sqhk.co/wolowivem/dTicggX/vedatituka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_6027759c99eed.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/fatij-sikes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_604b88c352001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388158/normal_6005acfc3dbe5.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://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_4652ad4d5ae8461bb15bbb4c60f9f7cc.pdf?index=trueIn PDF document text
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_b312c55572c54fef91e0066b551f2134.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_off00013290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 4860 bytes
SHA-256: 9678e5f424ed4b49f22ff58e40c6065fd8dde02fe5b8217cdc9f75db81a5343e
font_01_sfnt_off00014311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14311 11360 bytes
SHA-256: 115a9bc9212fcabb9b838f53a2ccfb9175a8f8e7159ad3f49bd8dcc6051364ab
font_02_sfnt_off000169a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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