Malicious PDF — malware analysis report

Static analysis result for SHA-256 d683be1457ee7c6e…

MALICIOUS

PDF

84.0 KB Created: 2021-05-31 16:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 302e066db9d299450cc83ed914525be3 SHA-1: 0f3bc3bdf463d4dcd9c5eb86f4afe51e45a36421 SHA-256: d683be1457ee7c6e4cac82603bc2cfcb7a03a1dd69a58d6de055b6ef8c37362f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document contains a large number of external links, forming a link farm, with the primary URL being 'https://garglob.ru/pbw?utm_term=inuyasha+capitulo+174+espa%25C3%25B1ol+latino+completo+hd'. The presence of numerous PDF links suggests an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/pbw?utm_term=inuyasha+capitulo+174+espa%25C3%25B1ol+latino+completo+hd
    • https://static.s123-cdn-static.com/uploads/4369333/normal_5fc8e5b68c715.pdf
    • https://majejuwusi.weebly.com/uploads/1/3/2/3/132303270/sevomovunif.pdf
    • https://cdn-cms.f-static.net/uploads/4389586/normal_60387c406f9ff.pdf
    • https://cdn-cms.f-static.net/uploads/4444852/normal_602820b8677a2.pdf
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/kadogofelujaridiv.pdf
    • https://cdn-cms.f-static.net/uploads/4504788/normal_6034468cc6af9.pdf
    • https://cdn-cms.f-static.net/uploads/4366402/normal_60158e11197b5.pdf
    • https://cdn-cms.f-static.net/uploads/4459941/normal_6014d5052eaa8.pdf
    • https://static.s123-cdn-static.com/uploads/4445881/normal_5fc86f9a231f1.pdf
    • https://gurawibozogudex.weebly.com/uploads/1/3/0/7/130739732/5fd41.pdf
    • https://cdn-cms.f-static.net/uploads/4374175/normal_60470eb088625.pdf
    • https://static.s123-cdn-static-d.com/uploads/4484641/normal_60b14e3517c64.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a0292439-35cc-4fe0-9c27-499481135673/8273104253.pdf
    • https://uploads.strikinglycdn.com/files/6c16b61b-10cc-4355-9856-8f420c1334d5/how_to_improve_equality_and_diversity.pdf
    • https://uploads.strikinglycdn.com/files/07ed0f91-9b19-4fb6-bde5-5991d9d7eb37/nexager.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1cc.bin
36ff43e4982a7121f34b992d5eb6f47c7157c5ea87033f4a8ae9824788e15e84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 3516 bytes
font_01_sfnt_off0000ee66.bin
2bf01a7d1fbb5ed83f5a36d2d9e8e2822a99bade308d5ff597519ccd6493fbb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 5688 bytes
font_02_sfnt_off00010175.bin
6bf70edcb5bf8416f6744bd01b093372f9969f77b88548ff372c83d87a26eaf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 13280 bytes
font_03_sfnt_off00012a62.bin
1733294cd4efe6eb5a1c38b033a3da0bd69f43be3259469e0667c8323d1c848a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A62 16092 bytes

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