Malicious PDF — malware analysis report

Static analysis result for SHA-256 a678dc3d55575a93…

MALICIOUS

PDF

98.4 KB Created: 2021-03-24 14:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 462aa40af81f3a7dbb906d44206c1274 SHA-1: a8d1dd109dae72d01404e7f58f2cff20df057fd6 SHA-256: a678dc3d55575a932d7bf91caf96d5dfa3779c92de75545a9afd4105282d6584
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary malicious URL identified is https://soxebez.ru/wix?keyword=dbt+skills+manual+pdf+free.

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://soxebez.ru/wix?keyword=dbt+skills+manual+pdf+free PDF link annotation
    • https://digavonuvuveg.weebly.com/uploads/1/3/4/8/134851043/gigalugarivimi.pdfIn PDF document text
    • https://todukikezigegu.weebly.com/uploads/1/3/4/3/134359798/4853996.pdfIn PDF document text
    • https://xesudubivutomu.weebly.com/uploads/1/3/5/3/135303490/nizixejaz_pepefimegamo.pdfIn PDF document text
    • https://bevereka.weebly.com/uploads/1/3/0/7/130739533/bevazikiro.pdfIn PDF document text
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/wepogopekoreruxow.pdfIn PDF document text
    • http://gojuwogerex.iblogger.org/affidavit_of_heirship_texas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_2b433ffffb8d49f1959344f5585598a4.pdf?index=trueIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_f5c7f4b807134595ab42a560ec8a8a0b.pdf?index=trueIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_6c0dbc99231e4888b80524b19e850ba9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5346ee2-137b-4e32-9ec0-c63a3517f692/womokedavepikuzarixuzifu.pdfIn PDF document text
    • http://fidosofesus.rf.gd/chaar_sahibzaade_movie_hd_in_punjabi.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_01c25789795f474792e0bc6b3f55dba0.pdf?index=trueIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_5eb7f59cf8d4437490635e607aa56e8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de69aad-e30b-43b8-a068-0d9a7a6f16bd/56332279966.pdfIn PDF document text
    • http://vedezaduxi.epizy.com/garden_answer_wiki.pdfIn PDF document text
    • http://xuxamasisovuku.epizy.com/anti_ragging_affidavit_format_jadavpur_university.pdfIn PDF document text
    • http://winovonisalupib.rf.gd/64054168162.pdfIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_26f3176b5a054f86aed836ba24114918.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_aa9f5834358448fab0d490ad3b325bac.pdf?index=trueIn 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_off0001423b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1423B 5392 bytes
SHA-256: 95add880b64e4883da12c2a0414d4e13e05ccdabe3b64083e5cde20ebe8232d3
font_01_sfnt_off00015478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15478 11168 bytes
SHA-256: 3163324d9a4705d919da447c6e44a7974b8718aca9c3128526491ed73289b243