Malicious PDF — malware analysis report

Static analysis result for SHA-256 65528a2d2f5a91c3…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 14:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbb2cf7b6e3b80cfddbcf58260671e0b SHA-1: 6a32f70ce51d100aa6877641dac36939a3e820c5 SHA-256: 65528a2d2f5a91c393f9139639868cd987649c72a571634cc506cd49409e243a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one prominent URL being https://resalured.ru/123?utm_term=argonavis+starting+over. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful sites.

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://resalured.ru/123?utm_term=argonavis+starting+over
    • https://bumogekatagod.weebly.com/uploads/1/3/0/7/130776321/b1f937f5a.pdf
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/1862816.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/30b510f0-7c9a-4684-99cd-f853291a2f82/what_do_pecha_mean.pdf
    • https://uploads.strikinglycdn.com/files/297c1782-33b6-4eba-9d02-2da917c5c1ee/what_is_the_net_cash_flow_formula.pdf
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_d7fe0f73a06642b2bb222b51101759d8.pdf?index=true
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_baf5649703814a1796fb8a7cce580182.pdf?index=true
    • https://4b3c1411-62fe-4b74-ac0d-dad8ff5dd90a.filesusr.com/ugd/d10829_622bdf8691694bc89af554eaecca02e6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/604b5649-1823-4141-889e-15cc31d25a66/what_is_natural_motion.pdf
    • https://s3.amazonaws.com/wujodibu/drunvalo_melchizedek_sedona.pdf
    • https://s3.amazonaws.com/gonasidupij/clerks_award_2010_pay_guide.pdf
    • https://s3.amazonaws.com/legenapi/south_carolina_dmv_real_drivers_license.pdf
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_68ba140edae940749dc6bbf2e8406e13.pdf?index=true
    • https://s3.amazonaws.com/dikomavomem/zuzojokakepupepitirij.pdf
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_7a49a13ef45b4ed2b70bd475640bdd8e.pdf?index=true
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_1bff8a705932422ca760fc23fd022cf8.pdf?index=true
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_f13ef257d1394cc7b4744f91bcfbb577.pdf?index=true
    • https://s3.amazonaws.com/sogovekevi/fubemaxoxafaxovukikil.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23f.bin
f0a1d326684dc7d1bf496c3835e19faa38a51db18a34901df09f881df8e06aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF23F 4868 bytes
font_01_sfnt_off000102e9.bin
438f041af38098d260a080fdf7097e97db81529cec035496b1a80902a51e0da4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 11012 bytes

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