Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f86a1897d1d384…

MALICIOUS

PDF

66.0 KB Created: 2020-11-22 05:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 755965208182cebee8cb999de28436aa SHA-1: 02011836a14290db8c4bd57614803cb8907a895c SHA-256: 55f86a1897d1d384045333d581cce05f4f001487a8f2b78418973210c11bcff8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/wb?keyword=project%20management%20work%20breakdown%20structure%20template In PDF document text
    • https://bijimeko.weebly.com/uploads/1/3/4/3/134327756/norewijad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_5f91b71f25530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5fb9c3a6ec2cd.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/4c2cb17da89382.pdfIn PDF document text
    • https://figerifefiter.weebly.com/uploads/1/3/4/3/134343277/36cb1.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/disoduvemidemexipet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5fadd3afcd236.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/gurafoga/photosynthesis_diagrams_worksheet_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/398b63b9-92bc-4d46-a3c1-428a1ae669db/93013672596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b9dea3-27b6-4dcd-acd6-985385a6af7a/19516274275.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/android_netflix_autoplay_next_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d357edf-a15b-49a5-9977-cbae075a4210/87542526085.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/bramman_movie_video_songs_hd.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_off0000c299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC299 5764 bytes
SHA-256: b9fda5176b7657b4624409fc91be1dc5a4267a9c51198bcca7737b999244f16b
font_01_sfnt_off0000d62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62A 10844 bytes
SHA-256: 525b20adec61608c04bf739ecf58ae1760fd4d3651c5995a697e211cc32c2b0d

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