Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4b929c56dde6e4…

MALICIOUS

PDF

72.6 KB Created: 2020-11-25 23:07:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6c17abc1450422c3b465a077a154868b SHA-1: bde99941468ea5cdb4f08c95fb19ac9e44245088 SHA-256: 9d4b929c56dde6e40f043daeb831acbf606abe90019ddc76f0ea76cc237ceb63
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, and contains numerous embedded links. Many of these links point to disposable hosting services and appear to be part of a link farm designed to redirect users to malicious sites or potentially host phishing content. One such redirector URL is https://traffmen.ru/strik?utm_term=deshon+thomas+tallahassee.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://traffmen.ru/strik?utm_term=deshon+thomas+tallahassee In PDF document text
    • https://nibawomufexax.weebly.com/uploads/1/3/4/3/134371272/pulizirav.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/kunuliwakemeso.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/doforowolatoguvatogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fbcec773cd52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fb47d5dcbb05.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/pubodener.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5f94e6a46a8ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5fa9fec073f74.pdfIn PDF document text
    • https://lidusibujoxoxo.weebly.com/uploads/1/3/4/5/134500869/xelidu_wulojubonidojij_folesegudapo_baguwogededala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471250/normal_5fa884898f173.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/broncho_vaxom_ulotka.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/all_the_bright_places_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef04cfd-29b1-447c-8c5f-201667018053/suma_y_resta_de_polinomios_ejercicios.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/ascorbic_acid_safety_data_sheet.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D9 4828 bytes
SHA-256: f262242d67979cc99e88c3f1813300872f5b62da3358cd03df691d9391badf57
font_01_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 10672 bytes
SHA-256: fd062980a716f9c2a2a3679be55ea213e276ad2473f375c2f6870e63304b15ab

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