Malicious PDF — malware analysis report

Static analysis result for SHA-256 41eacb413eea5e91…

MALICIOUS

PDF

82.9 KB Created: 2021-03-31 19:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b336c9e1e95a75d79e648b871e0f88b5 SHA-1: 12879b66f5f60fee2a3a9e3a422add0adc6320a2 SHA-256: 41eacb413eea5e91396c0f9d2abb58d54824e0538f8d3a9cae20573fa6553614
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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=dynamics+ax+tutorial+pdf PDF link annotation
    • https://soletobapikod.weebly.com/uploads/1/3/4/5/134582957/5316215.pdfIn PDF document text
    • https://fufarolobol.weebly.com/uploads/1/3/4/5/134597676/makabegijogosano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b92f9e30-2e9a-4f57-b101-0d0e8f991942/mawivaku.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/guxitidalufeje.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/dictionary_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/8914492510.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/zozesoriwanekisisi.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/24744220779.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/change_password_outlook_365_app_android.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_5bd632255c6c4275aa450e3ee488d9ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fogibi/cloud_9_vape_juice_flavors.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/tekuxesopezakuwovewetigig.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_d79de2a076654530b4858318ade82935.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/black_and_decker_mini_fridge_parts.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_3f8d06bb9c9748689cc947975729a172.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b72487-ea5c-4372-870e-3e61aeea5c1c/37441396154.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 5232 bytes
SHA-256: cb944a17ca65216ae3e09b79e96e67db762c6cda46181f29ac94cf26202998fa
font_01_sfnt_off00010a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A48 11116 bytes
SHA-256: 0374e5fbeb9ff6de173019289aaaee8e85292b3dca6276c8e29646bc5b33a05d
font_02_sfnt_off0001305d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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