Malicious PDF — malware analysis report

Static analysis result for SHA-256 f777392a9c6c8c1c…

MALICIOUS

PDF

78.4 KB Created: 2021-02-22 19:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 89048e73cd2969c548838eacbf3b8696 SHA-1: 9620b3b0a92a6dcc1859acc2b777ba20cce79c2e SHA-256: f777392a9c6c8c1c15d072c598c3883dda3ea70c45858661c6bbb1fcd83a0803
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 0.9998

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://crophysi.ru/123?utm_term=nikon+d5100+video+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448538/normal_5ff6af8e9a818.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/whj9amM/banjara_song_ringtone_download_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/gglPieS/89574344577.pdfIn PDF document text
    • http://mimawusavap.iblogger.org/totetefurifoxikekusubonaw.pdfIn PDF document text
    • https://vusugurubem.weebly.com/uploads/1/3/0/9/130969976/701e152.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/eahdTjf/spin_the_wheel_custom.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/jchhYhb/mobile_home_electrical_box.pdfIn PDF document text
    • https://gatilesajegume.weebly.com/uploads/1/3/1/0/131070678/tigugobipivi.pdfIn PDF document text
    • https://xanavixigusom.weebly.com/uploads/1/3/1/4/131453194/ginofugozope_xozufetodemojid.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/jdjfibo/dinikiwaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5fd2a4f2bfc65.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/jiEiaij/fallout_shelter_dwellers_special_stats.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/339476.pdfIn PDF document text
    • https://vuxamirajuka.weebly.com/uploads/1/3/6/0/136082549/1717502.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/dipifazo.pdfIn PDF document text
    • https://cdn.sqhk.co/xumobopore/r4gdBjc/monster_girl_maker_2_download.pdfIn PDF document text
    • https://wozomeki.weebly.com/uploads/1/3/0/7/130776066/duferupuforigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukasorepej.rf.gd/lakawikukedimabosifit.pdfIn PDF document text
    • http://guvoperar.epizy.com/black_eye_mask_template.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_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 4904 bytes
SHA-256: afe071ea2121c1427ed2952d117414695618df25772ea2ce11abfa074bc996ac
font_01_sfnt_off0000fee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE8 16860 bytes
SHA-256: 9aa91f58262c740b413a2fa8da92ac802d22346d7b439446e09791146c8387f4

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