Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f3b43783e101cf…

MALICIOUS

PDF

76.1 KB Created: 2021-03-16 00:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 023659314f26f7980528348bd3d1a6c1 SHA-1: 36d328267f92f2bd2b8dee1055a24a9e6e097381 SHA-256: 01f3b43783e101cf88b75545b2b9094419c4233e1852a7acb4643bb3f370bbd2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=management+of+peptic+ulcer+disease+pdf PDF link annotation
    • http://babumoni.iblogger.org/gawaziwebof.pdfIn PDF document text
    • https://diwodineguxep.weebly.com/uploads/1/3/4/3/134305573/kozitoj.pdfIn PDF document text
    • https://fojumotapikapig.weebly.com/uploads/1/3/4/3/134372119/mopipexezupibaw_kelivutubov_mobivavizof_pulufini.pdfIn PDF document text
    • http://tokibekojavo.22web.org/aromatherapy_essential_oils_chart.pdfIn PDF document text
    • https://mobefoba.weebly.com/uploads/1/3/0/7/130776725/9ae404.pdfIn PDF document text
    • https://govobozof.weebly.com/uploads/1/3/5/3/135315692/628a3.pdfIn PDF document text
    • https://siwevamad.weebly.com/uploads/1/3/1/8/131871433/384d735a3.pdfIn PDF document text
    • http://dimukidiri.iblogger.org/avira_uninstall_tool.pdfIn PDF document text
    • http://radasekot.iblogger.org/free_affidavit_form_qld.pdfIn PDF document text
    • https://wepizowo.weebly.com/uploads/1/3/0/8/130813330/8789553.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2086c46e-b63f-4456-8482-b0a963f31111/85154221520.pdfIn PDF document text
    • http://livixow.epizy.com/73360880345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfcb318-049b-4b7f-bf95-73425bd983a5/dodopej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e5be23-870c-4053-95ee-a76b9829383f/why_my_battery_is_draining_too_fast.pdfIn PDF document text
    • http://digopepu.epizy.com/11888347062.pdfIn PDF document text
    • http://wulixojapekapa.epizy.com/7978463543.pdfIn PDF document text
    • http://zopefunexot.epizy.com/45492975672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9592857d-46d7-4b35-9106-08a8a9392273/90900896145.pdfIn PDF document text
    • http://susofukezozuwuj.epizy.com/63724897128.pdfIn PDF document text
    • http://lojiwifi.epizy.com/answer_clash_royale_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79959ff3-d93b-4688-b00f-2f9603d86bcc/twilight_saga_full_movie_in_hindi_2012_download.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_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 5480 bytes
SHA-256: 0826ffeaa2c74f9189d969050dac782af974392a1e54a960ad6e15a1299676de
font_01_sfnt_off000100a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A7 10164 bytes
SHA-256: 45cde34d293857e72c34c6cfb11b5012c0f0f73c97f638451e540f6a7a088571

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