Malicious PDF — malware analysis report

Static analysis result for SHA-256 02180908ca5794b4…

MALICIOUS

PDF

72.7 KB Created: 2021-03-22 10:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea5076076c2fd4404579ad7dc4f72e5 SHA-1: 282ee4e557e43f44b0aa598068d0ac316dc526fe SHA-256: 02180908ca5794b4cb6b2441888cc39d74457ce114d72ed51dbd226284ce62b4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were extracted, the presence of numerous external URLs points towards a phishing or malware distribution vector, likely initiated via spearphishing.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=purederm+collagen+eye+zone+mask+30+sheet
    • http://naykaryadom.fun/zisifosijowepovusaruvigbs4dz.pdf
    • http://grantmedica.ru/hatchimals_colleggtibles_cosmic_candy_limited_edition_secret_snacksm766f.pdf
    • https://cdn-cms.f-static.net/uploads/4373779/normal_603c7d1ccea30.pdf
    • http://fortuneo.biz/jineloporulzc2bp.pdf
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5fce9321c9fac.pdf
    • https://jebovemedafo.weebly.com/uploads/1/3/0/8/130813903/7327072.pdf
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/5a2aa1230e.pdf
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/8948557.pdf
    • http://hookup754.fun/korean_grammar_in_use_beginner_answer_keyk5h5p.pdf
    • http://barcaporirternet-interbank-pe.com/lebuvafidibapiniflaohr.pdf
    • https://cdn-cms.f-static.net/uploads/4372355/normal_6019fa72eb473.pdf
    • http://brettlockhart.com/vadereridulpje7.pdf
    • https://cdn-cms.f-static.net/uploads/4370791/normal_6023653a79d12.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_18e1f87911be412c95dbf973d0fdf916.pdf?index=true
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_b8dd35e83f4343d19fe9413ee224dc19.pdf?index=true
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_8b5e0b77255942388e4196089a806ff9.pdf?index=true
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_cdc3d53de7e047d68e16bf6e047d1aca.pdf?index=true
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_50b7a235e1e04191a47b63f9aba61817.pdf?index=true
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_630c64e67e6b4120b58cad5e675c37a1.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d151.bin
5226c763f3d4f3cbceb38bcb13217c6b3d4a8982263ccab1e51df51dbcfe70e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD151 2900 bytes
font_01_sfnt_off0000dba6.bin
58db92b10b4a4e0cda16a52008d53787f7b951e40066c7e7d726046fbf97f153		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA6 5876 bytes
font_02_sfnt_off0000ef86.bin
799ae477231ed9746df18886463daed8f5ffce9da3f2177e778e07a25e82a908		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 10444 bytes

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