Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ef49efc4e5d178…

MALICIOUS

PDF

72.7 KB Created: 2021-04-13 09:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5deb0b57014ae454bbd66e9ffde79eef SHA-1: 517ec38bbfa7f0bd49f195d1dd81e087fa2ab9fe SHA-256: 05ef49efc4e5d178aebdd40495b0a637435c251eb01c114f159dfeb30c115659
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a link farm and another pointing to a URL associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=midnight+blue+velvet+jacket+ladies
    • https://cdn-cms.f-static.net/uploads/4402032/normal_6033c02029ae3.pdf
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5fd72c70834fd.pdf
    • https://cdn-cms.f-static.net/uploads/4426547/normal_601674965d432.pdf
    • https://cdn-cms.f-static.net/uploads/4455396/normal_604a846f7aa9a.pdf
    • https://cdn-cms.f-static.net/uploads/4453532/normal_5fe6bce5a46d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://movuzog.rf.gd/antimicrobial_drugs_mechanism_of_action.pdf
    • http://simufuravaged.rf.gd/13091882173.pdf
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_5b715efb9a674ed78ab3557f4b71bc73.pdf?index=true
    • http://magonusu.epizy.com/49595314016.pdf
    • https://uploads.strikinglycdn.com/files/6ae67915-195b-4c77-b42d-05626a16284a/doboxejujilezuwugekirapen.pdf
    • https://uploads.strikinglycdn.com/files/7ea38da4-fe53-42a4-a117-d644792ba7a6/xexutixojomijukasasaxeta.pdf
    • http://wofenexofube.rf.gd/19891401075.pdf
    • https://abc5f1b3-ad37-4660-b048-d9bff2240d70.filesusr.com/ugd/a1fb68_0d670d4b06f04c3b861937bdd8837d10.pdf?index=true
    • https://43466d02-873c-4564-b63c-f2f79aa6d38e.filesusr.com/ugd/fd64e8_82e20ce01b114d3e86aec3d146922eb0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/046ac630-99cf-4da5-8a63-5433255a6cec/farewell_to_manzanar_quotes_about_family.pdf
    • https://uploads.strikinglycdn.com/files/1513dd8a-bae9-47d8-8e00-0b309c88f771/8316004081.pdf
    • https://uploads.strikinglycdn.com/files/a164dd93-501e-4a44-a5e0-4eeae4a2719e/fesuzada.pdf
    • http://xinegubuxagod.rf.gd/vofupoxavevilefu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c729.bin
fd8ea54ecaecf1fda638004e2aa796658585851d2850dcf98de83c344c77c22f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC729 5448 bytes
font_01_sfnt_off0000d9ca.bin
61a1fc84dc1d941a5d64ea4745e4127f0abab58831c37deffacca8122eaa8aba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 10808 bytes
font_02_sfnt_off0000fec7.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 16204 bytes

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