Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7656e18d6353dd…

MALICIOUS

PDF

74.8 KB Created: 2020-12-27 02:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cba255c1f84caaf98c12313e0a24ecc6 SHA-1: d2a468a3f7463617ab651379c5c25473acf8bda0 SHA-256: cf7656e18d6353ddcff402354edc123a8236e70a4a0010f0be1f224e1bb0f3a1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. One of the extracted URLs, 'https://trafffe.ru/123?utm_term=collaborative+practice+agreement', is flagged as malicious and likely serves as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

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://trafffe.ru/123?utm_term=collaborative+practice+agreement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f98c00656576.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/ijehchi/sony_rewards_mobile_app.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/9382355.pdfIn PDF document text
    • https://penogefuf.weebly.com/uploads/1/3/2/7/132740618/xelutaged_gefiveroka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3e85eae6-863e-4930-8b73-9f1de6775007/88209793028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d52d0d55-d072-42dd-b6e8-f2433d5af7ea/zorebutomibunosu.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/kafutinadolejudopok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ac7d23-e14e-4208-891c-7fb98e37797d/pigtronix_infinity_looper_2_vs_ditto_x4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ab6ff4-9ab1-4279-a46d-dbcd2007ac72/lekesiwalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53e5d3f-afc5-41bf-b9db-80e0de309a77/dobilakanedewoj.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/strength_training_anatomy_workout_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ff7a44-3267-4095-915a-3d170d8f6121/zitogabepajasewanikija.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC9 5084 bytes
SHA-256: a9d60e1c502c6169822d034c1a96b9111996da152e80e4909463260ab40d3dc7
font_01_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 10464 bytes
SHA-256: c7625a06c82680bd1977ab32a36c2d8fb1e521f534475996a3818917d2ca5887
font_02_sfnt_off00010fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.