Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ce59e0ad2f5698…

MALICIOUS

PDF

72.1 KB Created: 2020-12-26 19:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ccb810da80be62f07c6bcfab3152d68f SHA-1: 9727eff8e4ff5760774239f6067853c7df43bc2e SHA-256: 82ce59e0ad2f56983756d2dc89fe1dbe6ec4c188187a4b4f14d96c8a876f44d0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary goal of directing users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users through external content.

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://traffine.ru/123?utm_term=crate+and+barrel+flannel+sheets PDF link annotation
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/d0388aac20366.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5fc46ba225736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5fc301099e0e4.pdfIn PDF document text
    • https://jozolarameb.weebly.com/uploads/1/3/4/4/134402644/1974553.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/kXgdijk/money_maker_ludacris_nelly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_5fafb8988e2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5fafd11c9e22a.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/Xic2m0V/tangled_2_ever_after_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5f9e8cafd2b22.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/idItEgh/color_galaxy_live_wallpapers_3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fdd821-6683-4a4d-b646-028242ab1189/36741751425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9cdf916-ecbc-4136-bc77-a4ae42b1f7f8/awesome_tanks_2_unblocked_hacked_infinite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36d4aa9-0b32-48de-af38-3d957f2d4b3c/words_with_b_r_i_d_l_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9283ca-41c6-4185-af7a-0f99eb8b6b95/read_impulse_by_ellen_hopkins_online.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_off0000dd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 5040 bytes
SHA-256: abab695c1ce7d2fbcbee01cd1a573e8461bfac13380106acd49058b6b59ae3ed
font_01_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 10784 bytes
SHA-256: e165bed0250525abe12ea1baf3523a047e57b958d946c644b6fff30c82055d58

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