Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0b50af640c0ead…

MALICIOUS

PDF

84.9 KB Created: 2021-03-08 15:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 426aba1d8370f3c1b599db6657a638bc SHA-1: 29f71e35b117d6badb75df61c26ed0bb9e51ffe0 SHA-256: fa0b50af640c0ead0dcb134ddff47901b0be9b6e86e02c93bd1f9cbbf66b85c4
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=raksha+bandhan+dj+song++2017 In PDF document text
    • http://linavaluviriv.getenjoyment.net/38805847903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_6035b4e785086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_6035b783b5083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371265/normal_5feb2e137cbc8.pdfIn PDF document text
    • http://xolokukifimiv.sportsontheweb.net/58320283863.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/caller_tune_airtel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476590/normal_60375b4a2ca8e.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/67308856293.pdfIn PDF document text
    • http://wiwalubezit.22web.org/radadusitedamunaderororiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_60445fe13234e.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/87969515929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_3dd493068f7d45eba224b359f2c7bc08.pdf?index=trueIn PDF document text
    • http://fopopas.epizy.com/icivics_got_grievances_answers.pdfIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_5060cf60868b4c76a2b82b5fa5abe4ec.pdf?index=trueIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_b941ae163bc74e588ef53a2ba909e0f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e7e58e-bcc4-4416-96fe-8b6b0ac9011c/15810396361.pdfIn PDF document text
    • http://gevosumol.epizy.com/2073502333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321c093c-0de3-4359-9d1e-5f5255e6fd85/29586161108.pdfIn PDF document text
    • http://lojosikol.epizy.com/differences_between_monocots_and_dicots_worksheet.pdfIn PDF document text
    • http://neragan.rf.gd/boramomip.pdfIn PDF document text
    • http://zunakaduwuba.rf.gd/zivuxituropaduvibi.pdfIn PDF document text
    • http://kujujeta.epizy.com/avengers_dd_guardians_of_the_galaxy.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_6a17b9bf78c84417b37eac0208bbaf0b.pdf?index=trueIn PDF document text
    • http://girofili.myartsonline.com/the_mingling_of_souls_quotes.pdfIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_637bff32e0f84a0598a2750b4e8afc93.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 5652 bytes
SHA-256: 3dc956b0f3d6e6505271647d4f9c676c22f3168a1700916401968eab69f1c966
font_01_sfnt_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 10752 bytes
SHA-256: 77aabaea766b9318da63d9d01a1013f5e99eedc26acf57febf2b49ce6938e27c
font_02_sfnt_off00012244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12244 20644 bytes
SHA-256: d96716f9ed964cc8c2da809a4c96458dd918d87dd640d0b01ea0ada153691274

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