Malicious PDF — malware analysis report

Static analysis result for SHA-256 196a737bb58c21e3…

MALICIOUS

PDF

73.3 KB Created: 2020-12-30 09:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a1ba34855741000445bce649693c6748 SHA-1: 7433638c4859713bc4cf76f3d73e01ca62f040a0 SHA-256: 196a737bb58c21e3cb76e1677c416c1f8ddfb862b463fc1be24a418990ee396c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that appears to be part of a phishing or malware distribution scheme, disguised as a free book download. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/strik?utm_term=business+communication+skills+books+free+download PDF link annotation
    • https://pazudafodimaje.weebly.com/uploads/1/3/0/7/130776249/fogaw-lekotolikuxesow-rarunofuromig-wumawizakegonek.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/fenoguxinotare-gegire-pekininebupap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454561/normal_5fdb1e721c85c.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/semuxemakaw/35177465793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2577f0-71f7-48c3-abe3-c17c4f239ce9/tetolased.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e136c6f-edb3-4b19-b4c1-7df18f88208a/nalokapi.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/78218932906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8a83a4-fd13-4a9d-a18a-aa7c7722bc57/69255789769.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/lagu_salah_apa_aku_cover_aviwkila.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/33665267872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0149b1ff-23c0-429b-97a5-82a34d94a74a/fivorudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377afd4c-b147-450d-a929-0bd7e65692b4/terubudofefile.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_off0000e295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 5512 bytes
SHA-256: 0a4f988d1cf6060dde725b65c550d668c25d92172a0c27303307307a72269fba
font_01_sfnt_off0000f550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 10176 bytes
SHA-256: 5b8f106531d9f220822eed7d456a43423695867ad8770c125de89e3e6ae2f57b