Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2c11b1fd00cd45…

MALICIOUS

PDF

67.6 KB Created: 2020-12-16 03:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6d10122f675b155183eb784850978f12 SHA-1: cf62c810cc10cec6fafa285cb43aeb203d67a9b4 SHA-256: 6e2c11b1fd00cd4538aa16983276a21d7f3a2c003d769c9a26481d01d0e8df76
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one pointing to 'https://s3.amazonaws.com/jipowumat/5842887184.pdf', likely as part of a link farm to distribute malicious content or for SEO manipulation. The embedded URL 'https://trafficel.ru/123?utm_term=ecchi+on+hulu+2018' is also a primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=ecchi+on+hulu+2018 PDF link annotation
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/df5905fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_5fa6d9cf29bdb.pdfIn PDF document text
    • https://ludolukek.weebly.com/uploads/1/3/4/6/134699908/5198112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5fa0dcfd93621.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/jipowumat/5842887184.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/the_cosmic_perspective_bennett_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/gotubefipexezoditu.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/physical_science_chapter_13_review_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2125b52c-15c9-47df-aa88-2694099ed012/altec_lansing_mini_life_jacket_3_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/gepigilakunakokimotami.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/choomantar_song_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/21846806251.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_off0000cbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB9 4880 bytes
SHA-256: 9c64344228af314923f9bdef9a0e955ccac4db484d68f91b23d12ab0b5c81a16
font_01_sfnt_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 11236 bytes
SHA-256: c5e028afb90e740214b4c14e4ba7f57b08183b5ffde1f666c3aa5be8dbf4aaa9

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