Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85d50f2ceec51b8…

MALICIOUS

PDF

81.6 KB Created: 2021-06-09 22:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0e26c1bc8ea363f9b1979a89c88910bc SHA-1: 3fb7115e820ea2f3a0cf51bc232885939670cbd7 SHA-256: f85d50f2ceec51b8366557b80b2520fd355bb2ad55bc75f7ea87103fb8eba446
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, many of which are hosted on disposable domains or use UTM parameters for tracking. The primary malicious URL identified is https://allytemp.ru/pbw?utm_term=yandamoori+veerendranath+kannada+books+pdf, suggesting a potential phishing or SEO manipulation scheme. No scripts were extracted, but the PDF structure and URL distribution strongly suggest it's designed to redirect users to malicious or deceptive 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://allytemp.ru/pbw?utm_term=yandamoori+veerendranath+kannada+books+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410989/normal_60630654e02f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425916/normal_60053c49af4c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_600f64df28823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407724/normal_6060afc1667c3.pdfIn PDF document text
    • https://lufasewobomitod.weebly.com/uploads/1/3/4/7/134730449/kumodivafi-robabej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465390/normal_60bd39028e4ca.pdfIn PDF document text
    • https://noxesuxaram.weebly.com/uploads/1/3/4/3/134311780/7df3e83ba3.pdfIn PDF document text
    • https://fuzujaloxoz.weebly.com/uploads/1/3/4/6/134684853/2938750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404292/normal_6047c4fa56832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427504/normal_6008983c042e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_6018ee2197591.pdfIn PDF document text
    • https://widawukilifuduz.weebly.com/uploads/1/3/5/3/135398171/purele-bobipeju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_6039b7eaa2a1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/91622d96-839b-411c-b08b-036935cafe88/grille_salaire_convention_66_educateur_spcialis_2021.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/68024950081.pdfIn PDF document text
    • http://jadubunid.pbworks.com/f/fire_emblem_warriors_weapon_skills_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b619720-e2f2-4aeb-8b5f-e5919ca9900d/rapuxizox.pdfIn PDF document text
    • http://poguvovuk.pbworks.com/f/fivakelikegaminusor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/340bd8dc-f147-4261-81bc-4c23dd84691b/mizobikamul.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 5260 bytes
SHA-256: b3b6056fa9893c317317144f928a4fe9a8b2dffeeccabbab932ef0520398f359
font_01_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 9596 bytes
SHA-256: fc65e4a407fce055eb2e2ea1ad2d079a7af1a02a763a6f706e6efaa649ad473c
font_02_sfnt_off00010483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10483 11196 bytes
SHA-256: 629ef89628ef40f8c1e97f8eae7c0969472e487295d383055048e5bc5ddba85d
font_03_sfnt_off00012a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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