Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1bf4383181089ce…

MALICIOUS

PDF

74.1 KB Created: 2021-03-10 08:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6bce41fd58517adc9cbf34b318d09a17 SHA-1: 31ee33d6fd10f8985c2137bf29aaeb5554dad553 SHA-256: c1bf4383181089ce1215416b1e48b74e687ee3a62733a941ccabf3d463badcf9
186 Risk Score

Malware Insights

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

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 0.9990

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://ponafet.ru/wix?keyword=bose+sounddock+series+iii+specifications PDF link annotation
    • https://gotanizanoga.weebly.com/uploads/1/3/5/3/135332446/kuvetekuvupax_tamogogubi_vavodi_donajomixogir.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/guzigijure.pdfIn PDF document text
    • http://lakulikelanu.iblogger.org/dobifakekiniwimuvat.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/rasubafisejonu.pdfIn PDF document text
    • https://torimavilok.weebly.com/uploads/1/3/5/9/135984964/82849.pdfIn PDF document text
    • https://nofemifi.weebly.com/uploads/1/3/2/7/132710694/8730858.pdfIn PDF document text
    • https://jometuke.weebly.com/uploads/1/3/0/8/130874139/ab9d44b9.pdfIn PDF document text
    • https://wuluruvujomokax.weebly.com/uploads/1/3/5/3/135349857/8424735.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/wadonodabu.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/e4ad4f997f97d.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/kugegiraruj-lapifirixitawo-narisekadola-bojomoriv.pdfIn PDF document text
    • https://ramunigifobix.weebly.com/uploads/1/3/4/8/134891190/jipijiruwebajujo.pdfIn PDF document text
    • https://wumetitazidizo.weebly.com/uploads/1/3/4/8/134885052/5ae6452f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/21650693629.pdfIn PDF document text
    • http://fewetero.epizy.com/81352398599.pdfIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_fcfef6d366bf448390c0a6aae7850659.pdf?index=trueIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_8c4eb2ab35f243e5857ef8398565a2aa.pdf?index=trueIn PDF document text
    • http://makeromevoju.rf.gd/76911282005.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/wuguledo.pdfIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_775faa960e374e0492a599cdee75c09e.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_e0e849a621b044d39280785eb3f23827.pdf?index=trueIn PDF document text
    • http://popefididogake.epizy.com/2000_ford_ranger_xlt_engine_oil.pdfIn PDF document text
    • http://kijemuf.epizy.com/42303703619.pdfIn PDF document text
    • http://dukazaxotak.epizy.com/76643590842.pdfIn PDF document text
    • http://pifazudiso.rf.gd/chemistry_placement_test_study_guide_csulb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 5232 bytes
SHA-256: 3e68d61c99f831dd412b01d86d13e260aec9705b5be435228711b878a40931ab
font_01_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 10432 bytes
SHA-256: 712b2ccebc8bfe6176d3ef944f9d17c8eeadc5ef414fceb3449dd918c8136f48