Malicious PDF — malware analysis report

Static analysis result for SHA-256 900ac706e2d4b0cd…

MALICIOUS

PDF

76.3 KB Created: 2021-01-11 15:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e8c172c221fe160b86a8b272a4506da4 SHA-1: 58d5b6a978bd3b341902bd05ee8afcafb1035c2c SHA-256: 900ac706e2d4b0cd3cec035dd9d110f24a1643b7153db5bb79371d31311b6371
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/123?utm_term=canon+imageclass+mf4770n+printer PDF link annotation
    • https://cdn.sqhk.co/wolitobutak/Pggoij5/nijatajamozilarutij.pdfIn PDF document text
    • https://gabubogoko.weebly.com/uploads/1/3/3/9/133997439/5936930.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/pSjiihf/bowl_over_the_competition_meaning.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/2734f5d9.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/531049.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/vajale_kutowuzawinajub_masewone_netulutud.pdfIn PDF document text
    • https://wezobugedelu.weebly.com/uploads/1/3/1/8/131856743/toduwu.pdfIn PDF document text
    • https://site-1177680.mozfiles.com/files/1177680/free_play_literary_definition.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/xiziboko-xelos-refiz-xegixa.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/xewopod.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/agjgchb/73434765477.pdfIn PDF document text
    • https://site-1167955.mozfiles.com/files/1167955/38824583500.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/P3iirHf/simon_the_sorcerer_game.pdfIn PDF document text
    • https://cdn.sqhk.co/digubamot/2ififjc/mugunitimanufozeworevomu.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/4ieiONR/call_of_mini_zombies_hack_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE333 2960 bytes
SHA-256: ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b
font_01_sfnt_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 5548 bytes
SHA-256: e1ee92b31e1142f1adf3c3c6ceda2aadba41d131dd4dfca04a236a80561fd092
font_02_sfnt_off00010095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10095 10260 bytes
SHA-256: 7afbb7b2c081f5cb28c2290891a0cd1890eaca3131c204e49183ecac44ada989

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