Malicious PDF — malware analysis report

Static analysis result for SHA-256 f869ea95dd1f0c8f…

MALICIOUS

PDF

69.8 KB Created: 2021-01-25 10:24:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dce12052ffad53a6832ba40078c4aac1 SHA-1: dde0c4c4ed6a9275f0b9b4cd7b1ec79bc25368f5 SHA-256: f869ea95dd1f0c8f8ea6b72f4abd3bcfe5a659664c814167bd35b4df0d5323eb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs, with a critical finding of a mass external PDF link farm. The presence of URLs like 'https://traffset.ru/123?utm_term=imagen+de+movimiento+circular' and 'https://cdn.sqhk.co/navuwamas/dyeibOy/battlelands_royale_hack_version.pdf' suggests a phishing or scamming operation, likely using these links to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is designed to facilitate redirection.

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=imagen+de+movimiento+circular PDF link annotation
    • https://cdn.sqhk.co/navuwamas/dyeibOy/battlelands_royale_hack_version.pdfIn PDF document text
    • http://moneymaya.site/amsterdam_travel_guide_amazon5ijdd.pdfIn PDF document text
    • https://lakafoxure.weebly.com/uploads/1/3/4/2/134266374/munerik.pdfIn PDF document text
    • http://pagebake.com/741944858985g55z.pdfIn PDF document text
    • http://baffer-shop.space/shooting_zombie_games_online_to_playbhyhy.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/WiejcSn/blank_name_kik_copy_and_paste.pdfIn PDF document text
    • https://zukikopan.weebly.com/uploads/1/3/0/7/130775822/cf3084b7a.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/912bd0a.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/lamonoropabe-pipolej-lepifawakasuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_600111b5ec34f.pdfIn PDF document text
    • https://giliwafe.weebly.com/uploads/1/3/4/0/134016831/6a3c4fd3ee2674.pdfIn PDF document text
    • http://znakomstva18x.site/racing_limits_apk_homedf1x5.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/jibevijuro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xifabilejilab/9213199589.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/93348176652.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78B 4960 bytes
SHA-256: 5dfff4b06b00c438ec20e4c7fcbb26f7bd4be1682598f98adee331f9e7bedc61
font_01_sfnt_off0000d848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD848 10392 bytes
SHA-256: b3d4993fd39a13bcc0838ff2ffd46367f1a3319ba2080784949641bfa717861a
font_02_sfnt_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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