Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd17858e743e7d3…

MALICIOUS

PDF

66.2 KB Created: 2020-11-09 20:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d5dc3c0c8414bbdeb6233dc27c2679f SHA-1: 7c1d28a861ad1b67102d73b420b7536daf32ae8c SHA-256: 0dd17858e743e7d33065772692c16746b38a644593552f4f24649bdb019ae95b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users via malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?keyword=merle+mishel+uncertainty+in+illness+theory
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5fa3c14ce5631.pdf
    • https://cdn-cms.f-static.net/uploads/4376875/normal_5f8cb76285586.pdf
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f8cab1bb17bd.pdf
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f8a5679831a4.pdf
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/7003196.pdf
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/5780780.pdf
    • https://panemomozig.weebly.com/uploads/1/3/4/5/134503052/pevisogedegur.pdf
    • https://vedegidimojota.weebly.com/uploads/1/3/4/5/134597995/9229675.pdf
    • https://sufusazowuk.weebly.com/uploads/1/3/4/3/134311692/a21171ccd69.pdf
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/6ab2ea7.pdf
    • https://kifugezob.weebly.com/uploads/1/3/4/5/134529667/dituwenotusil-sowebub-xifog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/modowor/polk_monitor_70_series_2_review.pdf
    • https://s3.amazonaws.com/zuxadol/pares_biomagneticos_dr_goiz.pdf
    • https://uploads.strikinglycdn.com/files/844b5024-0209-4da0-966c-dd22d0759168/how_to_get_free_diamonds_on_choices_without_verification.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c860.bin
f368b54a089a2bb76e76c289e262e2048b496738730fefea4665354680770199		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC860 5148 bytes
font_01_sfnt_off0000d9c4.bin
219c5b14332d650678c8dedbdcbb70b67b9106a98725b8f3df408a2e9a3a4505		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 9988 bytes

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