Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe78cce40fba400…

MALICIOUS

PDF

66.5 KB Created: 2020-12-17 04:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4fdd636cfeb8cc2344d2e0a83532714 SHA-1: d2ae9d51a81794344bb82873b8bc1e0772dada9d SHA-256: 3fe78cce40fba400cef4b5d54d6518329b57a2da0843aec813e4de538efc72a9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on Weebly and appear to be part of a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/123?utm_term=pathfinder+irrisen+ice+mage
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/xekukuw-forolopofezej-latiwigekiz-parapevu.pdf
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/getew.pdf
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/zawewozejopel.pdf
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/1a8be3ce4af3a93.pdf
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/2c22e97aeed19d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gupojakami/cartopy_transform_point.pdf
    • https://s3.amazonaws.com/marimejerebo/mufosadebojanazitibemidav.pdf
    • https://static1.squarespace.com/static/5fc6ded9579eee3ae06a23cc/t/5fcface514319a51dc3c64af/1607445733467/49078514836.pdf
    • https://s3.amazonaws.com/tunenijexe/juzuvata.pdf
    • https://s3.amazonaws.com/bejokazemur/uniform_bounded_definition_math.pdf
    • https://uploads.strikinglycdn.com/files/e8033709-6152-4af7-b33c-7dfce04ebfe7/14581397028.pdf
    • https://s3.amazonaws.com/sivanira/ascend_d10_kayak_price.pdf
    • https://s3.amazonaws.com/dobesogum/final_fantasy_13-_2_live_trigger_guide.pdf
    • https://s3.amazonaws.com/lolijexejomak/see_thru_storage_boxes.pdf
    • https://s3.amazonaws.com/pavujiniz/wobonelinas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c776.bin
6653cb82fe4762797ed449adb9002fb840d6a0d151ecede289ba3a5f974668e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC776 5404 bytes
font_01_sfnt_off0000d9ae.bin
ae3e9e402ed0c64dbceedee9e1d0bd292f9a6b4bf7968479374999754288e0c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 10508 bytes