Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c221913e70eb7f…

MALICIOUS

PDF

91.5 KB Created: 2021-01-05 09:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6e24c4481fc41e2dd0a4bae70efaba6c SHA-1: c0b80b162e10e946fc41d3fd2b7601aefc3eeb83 SHA-256: 07c221913e70eb7f10622d209f06079ff7465c5bdf51e2a606ed32699660aab3
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, including one to 'trafftec.ru', suggesting a phishing or redirection attempt. The presence of a 'download button' heuristic further supports the lure mechanism. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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=ucr+student+health+dental PDF link annotation
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/8643571.pdfIn PDF document text
    • https://kuvukodu.weebly.com/uploads/1/3/1/4/131453249/9660379.pdfIn PDF document text
    • https://rafoduju.weebly.com/uploads/1/3/4/6/134680113/83731.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/jemisajoda/zafuwinaxekeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40489095-1d00-49e9-88e6-efa11f04fb5e/legion_blacksmithing_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf5ea99-5c4b-4946-8b32-e3444cbbb5ff/82254504799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfae8224-36f9-49de-bd3d-aee24a8b3f49/word_count_on_pages_macbook_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/nuvikasupowoxaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bb0db1-ae1d-40ff-a74b-44694a7c96b0/what_animals_are_herbivores_and_carnivores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89996e7-0084-4790-8812-32eeeb36e577/wajulerulivovusexeneto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d32c35f-1024-4741-a4e6-831e5f33fec4/pink_hello_kitty_skateboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6012e21-78d1-4676-bf63-06a5b09804fe/fundamentals_of_physics_10th_edition_solutions.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_off0001294d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294D 5016 bytes
SHA-256: ab4a2ce280874b023696999db1fea7f606b1da5e0d30b30aa798d423984805d6
font_01_sfnt_off00013a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A56 11300 bytes
SHA-256: 60afaa040b13a51458bdb9e656b8d63eb740d4e0adfcb677006d3defbaa055f6

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