Malicious PDF — malware analysis report

Static analysis result for SHA-256 db74233156a4e005…

MALICIOUS

PDF

74.1 KB Created: 2021-03-20 21:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8f56d01a879b5fb34a0cedd32a41b57a SHA-1: c8b5a8091c3af7b6e971cb43ca4d743215186eb4 SHA-256: db74233156a4e00566a0e2b9ae14eac41f2fba786d45182d6471d1e651dc39ca
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing malware. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, suggesting a link farm or a phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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://bologen.ru/wix?keyword=ecuaci%25C3%25B3n+dela+recta+con+dos+puntos PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451035/normal_5fed515fcafe1.pdfIn PDF document text
    • http://dihtyar.online/liftmaster_elite_error_codesenyse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489835/normal_600146b59949d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_60520a91c126a.pdfIn PDF document text
    • http://summerita.fun/minecraft_pocket_edition_v1._9._0._15_apkm44lx.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/0335b0e3e369217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fe40ef0b1a19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_600549d9af08a.pdfIn PDF document text
    • http://tertov.xyz/all_american_pressure_cooker_921cpoqn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fe812369460d.pdfIn PDF document text
    • https://fegikunula.weebly.com/uploads/1/3/4/4/134482285/562306.pdfIn PDF document text
    • http://housefashion.ru/deep_dive_into_changes_to_iso_22000_and_fssc_22000bdarx.pdfIn PDF document text
    • https://titoduxelet.weebly.com/uploads/1/3/5/3/135399046/becb149fd33113d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_601ff5214df44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86cafecd-0af7-43e6-b578-14605c742a6c.filesusr.com/ugd/c4ddd0_d4b0089950d346afad8437d39684a311.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_829f8c6b41d94727b690bf25df0f172a.pdf?index=trueIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_5bef82e2b1a6489299397514f9f761fa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 5160 bytes
SHA-256: 13623c382c692c3661beb4e85729ec62ae372b5740ed00b264e015e9057333e0
font_01_sfnt_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 12276 bytes
SHA-256: a65e5d5ee8a9cd390c8ff88816d26c1a16b25e0e67b453c954230de41918d23f

Open this report in the interactive analyzer, or submit your own file for analysis.