Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3c6c6b07140040…

MALICIOUS

PDF

80.0 KB Created: 2021-03-24 21:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1b30b2daac1067813682b88f6dc4c923 SHA-1: dd82e83fdd75b73214f085d67685c76e6ac5dcb1 SHA-256: 5e3c6c6b071400401ca43028b6e90e59ede468d03fd548b34197486f12e354af
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bologen.ru/strik?utm_term=how+much+do+sodastream+bottles+cost PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409250/normal_600fa13f183e3.pdfIn PDF document text
    • https://lufuroxula.weebly.com/uploads/1/3/1/4/131408913/nuxibav.pdfIn PDF document text
    • https://nikidedinuxilal.weebly.com/uploads/1/3/1/4/131437821/0a8f7af8c7f60ee.pdfIn PDF document text
    • https://fixoxotogixas.weebly.com/uploads/1/3/4/3/134374926/lasapomisajadu_begor_sukef_xexedasomomeda.pdfIn PDF document text
    • https://sufupixugopibo.weebly.com/uploads/1/3/5/3/135316623/fb32acf8f76.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/sharp_tv_power_light_blinking_red.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444096/normal_5fe2529ab7355.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/ccna_download.pdfIn PDF document text
    • https://magolusasuxagex.weebly.com/uploads/1/3/4/5/134585119/98e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_601392e48c778.pdfIn PDF document text
    • https://mojulikobamod.weebly.com/uploads/1/3/4/4/134488450/kaliga_telebab_fosamud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457848/normal_5fec912a0f7f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5fe50cb9428f3.pdfIn PDF document text
    • https://xazoxudigoruxov.weebly.com/uploads/1/3/4/0/134095876/4309553.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/d19ed8f7e51.pdfIn PDF document text
    • https://notozovurex.weebly.com/uploads/1/3/2/8/132814393/golirox-fapuwilerabibo-butefugatu.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/versa_lite_charger.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/oscillator_lecture_notes.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_457b4ff472b4486794bb4b80ddfd7df6.pdf?index=trueIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_676a0c669ab74bf480f6fd2287489217.pdf?index=trueIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_fead279d96a341c8be19c10609a731aa.pdf?index=trueIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_5f13a9e664fd40fcb69f56f904445579.pdf?index=trueIn PDF document text
    • https://b0b8c8c5-0de0-49ea-8337-0a56b8a4e65f.filesusr.com/ugd/bf9dfc_a429c6a43fa14cd683fd603063ba13cd.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_off0000f6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 5372 bytes
SHA-256: 0f99249b048fa2eae5731946a3df749d68299da97514c8243022904b14923d9e
font_01_sfnt_off000108e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 11948 bytes
SHA-256: e6468a2c695f665d55f5fc092991f6cc696737b4bdb0f2bdd2133d655b1307f7