Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b443eed81cfdc8…

MALICIOUS

PDF

163.6 KB Created: 2020-12-23 14:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8c35fb6eeebab61a687e2537c1d0a8ae SHA-1: 2a3690d19e20e5ead2508d47145cecb5bef5fa36 SHA-256: e7b443eed81cfdc88010cd39b21e38304b01ad8fa8c7e4903637b9396fc96f26
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'traffnew.ru', suggesting it acts as a lure to a phishing or malware distribution site. The PDF's structure and embedded links are indicative of a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffnew.ru/strik?utm_term=woodworking+plans+for+sale+furniture PDF link annotation
    • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/21fea235a1a81.pdfIn PDF document text
    • https://jatokogeredere.weebly.com/uploads/1/3/3/9/133997843/2233073.pdfIn PDF document text
    • https://gazewowotom.weebly.com/uploads/1/3/4/6/134616189/ab92de40ee5.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/5999a2.pdfIn PDF document text
    • https://xadibepewi.weebly.com/uploads/1/3/4/4/134447443/tisidujedoxopama.pdfIn PDF document text
    • https://mokaredoraxo.weebly.com/uploads/1/3/4/0/134095924/3385719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/6039814a-ea23-4b98-8672-1365997bd658/87127922165.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/bowipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea49c0c1-39eb-41b5-8fe2-09831199bd6f/32109050371.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/7_functions_of_language.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/mabetubowibizetokatati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd808b7c-2531-4fcd-9b52-c1b0456103a0/42881601503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b24d48-891c-4f1b-b841-6cc4a8ff7662/family_heritage_cancer_insurance_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9ef8f8-22cf-488f-a3e2-2a017d9faf77/murefefasuwodekulavaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72b3ea5-2da7-46bc-b5a5-f8548c1b350d/xamujobo.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/vodifobixatipapedejitur.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000232fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x232FA 28212 bytes
SHA-256: 7fd765cf02edd4c7326e6323de26941f0a35905a4ec52269acbbdba9582516a8
font_00_sfnt_off00015f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F41 29992 bytes
SHA-256: 7cfe531a653257408f19a6d72e5c6cd2806e47a8e7bccfcf8785bed67da0f046
font_01_sfnt_off0001bd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD5C 5380 bytes
SHA-256: ba0bfaaf9db528169a7ade09aa35082e43a7801dc7da6198270674ffe48070d1
font_02_sfnt_off0001cfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFCD 9112 bytes
SHA-256: 74d9e7b5fc778033b7a7110601bb805409997f816118d6a9cbe3fee96b0ef6bc
font_03_sfnt_off0001e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E843 28432 bytes
SHA-256: 87dbae059cae5879d1ff45bf59519712221ba236c84ae0b846d286ca9c845019
font_05_sfnt_off00026478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26478 8004 bytes
SHA-256: 8c30e3c8af30c6fcfa1f563fb2b774233c3194210d2f6b16010963ebc009964e