Malicious PDF — malware analysis report

Static analysis result for SHA-256 2968c47499907c41…

MALICIOUS

PDF

79.9 KB Created: 2021-04-06 06:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed2504e1f1e664da9fa24604b1beadd7 SHA-1: 7bfdb24206a5915c0cda770719a21dea13d9b0e9 SHA-256: 2968c47499907c41ebe3a51e9942997d56dab6e0aa8dbbaafdcb398d3b56c104
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, indicative of a link farm designed to manipulate search engine results and direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt 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-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://ponafet.ru/award?keyword=before+i+fall+pdf
    • http://naturaitalia.space/61741301665g79rz.pdf
    • https://gupolapi.weebly.com/uploads/1/3/4/6/134629895/fuwufakovubab_vefoj.pdf
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/wuporipubabalido.pdf
    • http://uscarins.info/front_page_africa_liberia_current_newstemjo.pdf
    • https://juxeduwabup.weebly.com/uploads/1/3/0/7/130775558/jazawu.pdf
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/davafegosaw-dujosufajinaf.pdf
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/bavofisu.pdf
    • https://wenojuzak.weebly.com/uploads/1/3/4/2/134265903/fedb64352f39.pdf
    • http://ufenmac.com/high_metabolism_meal_planbwyv2.pdf
    • https://zolegezuboz.weebly.com/uploads/1/3/4/4/134462972/rajurufebozov-kawikizajum-rinemo.pdf
    • http://deemonatrafik.xyz/iso_27001_guidelinesv2jmz.pdf
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/kumawilakarefugeluja.pdf
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/bcca3d08d95e93.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_b7e1ab81ddd14b8babc89ae7c0a13d44.pdf?index=true
    • http://rodukamofuf.epizy.com/56616767254.pdf
    • https://uploads.strikinglycdn.com/files/7a1c7682-1ed8-478c-ac17-b5f8d20b5c63/tumomonorobipewosemad.pdf
    • https://uploads.strikinglycdn.com/files/fc22617c-8a37-4127-a0e0-fc7cc5166a5a/17967959313.pdf
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_2ef78cfff5274bdc96013b9c731c1340.pdf?index=true
    • http://tenezozujilajiw.rf.gd/arris_tm1602a_mta_review.pdf
    • http://wupafar.rf.gd/bully_obb_ukuran_kecil.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_off0000e638.bin
7cdaf785cf14ad1d62af20c2b9161fc01dbfd92e468f49f577f47301d8531238		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE638 4908 bytes
font_01_sfnt_off0000f6fd.bin
faf1f764b87f5c5441ecc8839774238acf7774f4d999ccf28d66e7a98303c776		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 11304 bytes
font_02_sfnt_off00011d20.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D20 16204 bytes

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