Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61a1f2fcf6ef17c…

MALICIOUS

PDF

74.6 KB Created: 2020-12-03 14:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8209e0d58e6fcfc0edec182a81c5bada SHA-1: 9b83bf39966e8ca81d3292ccdb95fe962ce3fc2d SHA-256: a61a1f2fcf6ef17c4f26288af3303af056358707ff916e23458d3e3ac785f89c
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, indicating a large number of external links, one of which is a suspicious URL hosted on 'trafftec.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text that could be interpreted as a lure for a 'brag sheet' or answers, aiming to trick the user into clicking the provided link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=parent+brag+sheet+sample+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5f944253024e3.pdfIn PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/49b396ef5a14f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462066/normal_5fc017924ce07.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/8621294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f928fc594a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501810/normal_5fc255a17bced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_5faddb6507ef9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6b7cb579eee3ae068beec/t/5fc7f6f02c0e4c30f4c3469a/1606940400221/classlink_fulton_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c759bf71053ccb28a36e/t/5fc5782c173fb5383b5d72ec/1606776876074/ven_y_toma_el_trono_jorge_lozano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea915cc-eb06-47f0-a037-709813966060/antianxiety_food_solution.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/wedil.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/grid_index_carsten_nicolai.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/osage_iowa_community_schools_superintendent.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/52092436668.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/2969910258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c31f145f-461b-4ca9-bb2d-e241f00ea0bf/bogegewikajil.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 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE763 5468 bytes
SHA-256: 2a70bbec5ce604483bd8d20872fc0535c5263e56c7172f1f20a44dcf582f28d2
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 10436 bytes
SHA-256: e35605c50d33a0dea03a572744b8b715bf1225f9aff394591ada9cb6b9ff8b4a

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