Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bfdb2f4cd3cd18f…

MALICIOUS

PDF

80.0 KB Created: 2021-04-08 17:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 89623f04d17e8590623cafb45a4f9039 SHA-1: ed71e84245907aa1cfaf1b0e5dab7563696842c3 SHA-256: 8bfdb2f4cd3cd18f4947875af9ecf6d2c42d0b2f5c5c6dbc9388be2c8313a3f7
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are on disposable hosting and appear to be part of a link farm, suggesting a phishing or redirection scheme. The presence of embedded URLs and the overall structure indicate an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=dagon+lovecraft+analysis PDF link annotation
    • https://cdn.sqhk.co/vizelupavew/jcnvkPB/repost_story_to_your_story_instagram.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://letgtma.bid/imperatives_exercises_with_answersvvqfa.pdfIn PDF document text
    • http://wakinozogedix.iblogger.org/flora_bacteriana_normal_del_cuerpo_humano.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/52242367561.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/xagakijuvodibefobup.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/dTjieje/iron_up_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/jbhajjd/horizontal_line_test_function.pdfIn PDF document text
    • https://bovoladimuva.weebly.com/uploads/1/3/0/9/130970023/3151587.pdfIn PDF document text
    • http://help-service-support.com/bemevanar2ap4a.pdfIn PDF document text
    • https://gunujudota.weebly.com/uploads/1/3/2/3/132303168/868364.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/awas_plus_report_login.pdfIn PDF document text
    • http://wejafopag.mypressonline.com/bogefukumovosowumope.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/vogdfzJ/89431839634.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogefotatuledis.epizy.com/kezuvepej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab87e7b-e461-4fec-a271-e4b5e8dd14b7/birerozelefukalofuro.pdfIn PDF document text
    • http://jodojan.epizy.com/wolfram_mathematica_7._0_free.pdfIn PDF document text
    • http://mamesejo.epizy.com/web_development_tutorial_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890dd3bf-c7c1-4536-86cc-50078c36de58/que_significa_guerra_de_guerrillas_wikipedia.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_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 5208 bytes
SHA-256: f70de5c5a8568e61c967827351e3ad8eebb0f991f8492a6736847b8089bb1152
font_01_sfnt_off00010d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D98 10864 bytes
SHA-256: de57c057e7b420bf9bbd384ce30b6c87b9975c6cb0cb8704d2a8197c7488f616

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