Malicious PDF — malware analysis report

Static analysis result for SHA-256 800b90e7a439eeb7…

MALICIOUS

PDF

76.0 KB Created: 2021-01-08 02:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 484a6450c4f099b6fd28f6a33b0af0e7 SHA-1: 30d2d4d847c316e18872969e428890b270166999 SHA-256: 800b90e7a439eeb70b182059f7789b9c4631b90b2c1eb812a9f14ab8e1e4d8de
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains numerous external links, with one pointing to a suspicious URL that appears to be part of a phishing or malware distribution scheme. The heuristic firings indicate a high likelihood of malicious intent, including a security bypass instruction and ML classification flagging it as malicious. The presence of a download button lure further supports the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/123?utm_term=mutilate+doll+2+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471114/normal_5ff440f44efa1.pdfIn PDF document text
    • https://luwigemo.weebly.com/uploads/1/3/4/5/134597726/tusorexeban_siraze_vikanure.pdfIn PDF document text
    • https://cdn.sqhk.co/vabadoma/jdjhcjj/free_first_grade_math_videos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5fec21efc8f61.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/hegp1hg/farming_simulator_14_hack_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/0AidgeO/setulaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5fb2c9e28692b.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/jhze9jd/nerorizepewoxuzo.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/gonafoziguwewe/naming_ions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b699d92e-56fa-4cd2-a225-3f435f9c15af/33644602974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e46491d9-58ff-4932-8977-1047204b9d1a/west_of_loathing_buffalo_pile_locker_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/here_i_am_spirit_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314ad0d7-cebd-4033-95c8-9a28a076b0c4/wexowibezirofebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86aa53ec-4d43-4a37-b33b-7fe0c48890e8/13023120175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e67fcdb-a5dc-4631-90a5-ec5acd95f809/93054182862.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50F 4772 bytes
SHA-256: 3342bdbdccd80b232007cb3187d0354592c15d49af919002a7881e796bc249c4
font_01_sfnt_off0000f574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 10668 bytes
SHA-256: 2524f694e080394e2da1bdd2da37d2ec81371c24d2be9e3e28705a0f6b3bcfca

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