Malicious PDF — malware analysis report

Static analysis result for SHA-256 00910c8c4d7f6acc…

MALICIOUS

PDF

93.6 KB Created: 2021-03-31 18:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 67787fa8460ad6d5cb0311af1b080dfc SHA-1: 1e5752c95e2244086b34856ea69421de0e32ebaf SHA-256: 00910c8c4d7f6acc3a156d0a8adc12ed561d0968205bb3e0901ff6e2ee68bd9f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://maypoin.ru/strik?utm_term=2006+chevy+equinox+overheating+problems PDF link annotation
    • https://joripulugafu.weebly.com/uploads/1/3/4/3/134318872/ruwujefeki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_6051888ca042c.pdfIn PDF document text
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/5e547cea.pdfIn PDF document text
    • https://cdn.sqhk.co/sofopiro/jhibMEO/8343661835.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/molikorusabo.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/veritexilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393751/normal_6003095f73a97.pdfIn PDF document text
    • http://bixorusinalabi.22web.org/80189115045.pdfIn PDF document text
    • https://cdn.sqhk.co/kixowijeka/89Np65O/kalesixerejoregizerawa.pdfIn PDF document text
    • http://autobuff.xyz/950962021xlhdb.pdfIn PDF document text
    • http://trikotoria.ru/what_does_stet_mean_in_proofreadingbf6dp.pdfIn PDF document text
    • http://makamar.tech/jufonapisabunig550lg.pdfIn PDF document text
    • http://vbruti.site/2004_cadillac_xlr_reviews_consumer_reportslrvgv.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://34ee038b-87c9-4ed9-9b12-bdd9230df7f1.filesusr.com/ugd/f9d4cd_afa772c067784cd3b8886f9da8b6e489.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_11bcfd7bd0e543dabd51c68deaf542ea.pdf?index=trueIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_80e62ab65dd1482ebae5c761679d9525.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_off00011db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB3 6056 bytes
SHA-256: c1f2aa454dab8b9b4201c697b210bac344dd67bdd3626bd8ab67da9f8f9c21c3
font_01_sfnt_off0001321a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321A 12260 bytes
SHA-256: ce4c2c15217a09c242715aeb36e3a0d148b22d27cb4312d8a3cf632d8c9ff9c2
font_02_sfnt_off00015b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B32 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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