Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ca6b5941427d9a…

MALICIOUS

PDF

68.0 KB Created: 2021-03-12 19:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a2d34a0f955e2f55fc139b6cd7a317e8 SHA-1: 73cdd73507645d0037c9490df038e6e705faa2fc SHA-256: 65ca6b5941427d9a079637f6d65b04615e92c70e72919fde2f535ee1880897bb
186 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, with a critical heuristic detecting a large farm of external links. The document body, though heavily truncated and containing non-readable characters, suggests a lure related to 'Schneider electric mcb catalog pdf'. The presence of numerous links to disposable domains and potentially malicious URLs indicates a phishing or SEO spam campaign, likely serving as a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/123?utm_term=schneider+electric+mcb+catalog+pdf PDF link annotation
    • http://itawegan.fun/47589350089w8gpa.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/207230.pdfIn PDF document text
    • http://pufonorigaji.22web.org/ruwaxamagozabobizowigujol.pdfIn PDF document text
    • https://tagesokute.weebly.com/uploads/1/3/5/3/135315496/fuporozizuzipexej.pdfIn PDF document text
    • http://cooldomen.space/apocalypse_worldivz5r.pdfIn PDF document text
    • http://raisinsapp.club/denugoqxkmu.pdfIn PDF document text
    • http://homearfes.com/78600374783basiv.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/mugiv_degoniz_vutukakeb.pdfIn PDF document text
    • https://xulakuvoloja.weebly.com/uploads/1/3/0/8/130813987/33a3e7c.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/zifujakemizuzox.pdfIn PDF document text
    • https://nawajutexi.weebly.com/uploads/1/3/4/1/134108687/duvoto.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/510ded288d.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/5544062.pdfIn PDF document text
    • http://changely.club/174249128789dfy5.pdfIn PDF document text
    • http://neliwiveles.22web.org/what_is_the_story_rumpelstiltskin_about.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_97d8372f62714df6baa402b233eb91b7.pdf?index=trueIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_9eb8f6f89bf04a54b86a41f4b08a5ac7.pdf?index=trueIn PDF document text
    • http://dapukagizepor.rf.gd/54923225365.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_a15b357db45e46a29864bf77a652673d.pdf?index=trueIn PDF document text
    • http://rupegofiminatef.epizy.com/82832674254.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_961f8b77f85c4f458d70149046af32e6.pdf?index=trueIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_71a6d0be8110453e8e99d06b3a0340a0.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_off0000ccf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF5 5632 bytes
SHA-256: 35d777a1dc23c41a6fbe2de4f2f26a946da028bad3684e0adf2b16daaf090710
font_01_sfnt_off0000dfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 10184 bytes
SHA-256: 7dde0ab82e1a467fa0c49088bea5a26b355e057dc3f6fe719373bc660ad8e7c1