Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ca47b4f2ff8deb…

MALICIOUS

PDF

75.0 KB Created: 2021-04-29 17:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ae6b1bcd0c8094119b2dac2b452771ed SHA-1: 7eb24a6586129a9550d6870cce8c89fffaafab6b SHA-256: 58ca47b4f2ff8deb868d4bf4422eb76f5fdd06d6cd76d48292bb46b935c4f013
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, suggests a lure related to verifying land documents, directing users to a URL that likely hosts a phishing or malware payload. The presence of embedded URLs and the link farm heuristic indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://fokemale.ru/strik?utm_term=how+to+verify+land+documents+in+hyderabad PDF link annotation
    • http://sakulog.sportsontheweb.net/zejiziver.pdfIn PDF document text
    • http://olx-delivery.cc/ganarigukobetadujunisqusn.pdfIn PDF document text
    • http://bestplacefor.rest/mtg_ad_nauseam_sideboard_guide3qcc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_60112a6d0c17f.pdfIn PDF document text
    • http://thechambre.xyz/suvevnyb84.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/jurnal_tentang_bryophyta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501998/normal_6000c401505f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_6060a7c468452.pdfIn PDF document text
    • http://mafejaruvoje.sportsontheweb.net/bepogitilimalijap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_6036f7f665330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_600dea15713e8.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/kosawozimoxasunamijifom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/kegob.pdfIn PDF document text
    • http://zapusov.atwebpages.com/completed_construction_business_plan.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_c7028b3dee994e1592cc16b08c4242a5.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_ac37644877b540989d7760bf5b5bdcda.pdf?index=trueIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_435374b1bffa490d9875747f5e9abf95.pdf?index=trueIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_0db399ab6f8b4beb83a9db82696a662d.pdf?index=trueIn PDF document text
    • http://retiziwo.myartsonline.com/17596402594.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/how_to_reset_usb_mouse_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/zebetapusavib.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_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 5616 bytes
SHA-256: 31af6d5b64da1781efe12467fddefe767e2c28ced548c2e94e2ac20c4317cc5b
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 10984 bytes
SHA-256: 1453151e8fcc8ff2824eebe10fddf0be7a2ed4feb649e962b84fdf2af1d3eaf2

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