Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd498821b832171c…

MALICIOUS

PDF

79.4 KB Created: 2021-03-29 03:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b55833a8c21809db2222a0d24510665b SHA-1: 72954ce6ba9a90798acd6e169797e96a0c171610 SHA-256: cd498821b832171c114e846ac330a2ed3fad7072739d7773e46b9a11d3d278c5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://soxebez.ru/award?keyword=august+15+speech+in+english+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402724/normal_6032f24949674.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/9210187.pdfIn PDF document text
    • https://xopugexufejan.weebly.com/uploads/1/3/4/7/134709921/96f10ec9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_603a67a426668.pdfIn PDF document text
    • https://guvufusefek.weebly.com/uploads/1/3/1/0/131070011/dovitoranod.pdfIn PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/a19e571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426830/normal_6033b6d52efaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_5ff0bf8e57c33.pdfIn PDF document text
    • http://rifimakegezibor.22web.org/the_choice_book_edith_eger_amazon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_e9614843da4e49528d2c8799dda7d800.pdf?index=trueIn PDF document text
    • http://nazifaba.rf.gd/3721100111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e717afa-cd5d-4fd2-b9be-d643412c6cb8/how_to_reset_nordictrack_x9i.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27f6d10-b07f-4576-9dd3-187054ccf846/smart-ups_1500_rm_2u_lcd.pdfIn PDF document text
    • http://lemaponu.rf.gd/9420150825.pdfIn PDF document text
    • http://nuvebuxuloruvux.epizy.com/minecraft_galacticraft_1._7._10_guide.pdfIn PDF document text
    • http://nototen.epizy.com/the_dark_knight_returns_comic_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16971dc1-7318-4b11-a036-cb491b622765/potuzejidululojuzidadir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e9d382-33c4-4656-8043-c9766df8b618/fenawepavufom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ae8a53-42ab-4692-85a5-64bdd27492f4/baropabukumu.pdfIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_644f98e9379b48a99002675d25cb3f9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f20c02-b010-479e-84a3-1abceebb2050/38019500578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29a097c-20aa-4db5-ba04-ec2a3b51b2cf/what_does_non_clinical_significance_mean.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C1 5276 bytes
SHA-256: 3c9dfd602423e4677013738773dfbed0992296d7006a22387bfbb49015ba71a3
font_01_sfnt_off000109ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CE 10988 bytes
SHA-256: 301431fd9f269da99dfb81418e9c342aace37bf7ac89e8fc8f46e5b831dfc2b8

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