Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbd88176a643f0d…

MALICIOUS

PDF

79.8 KB Created: 2021-01-08 18:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: abe14d9b8fef685d2a4381b1868e5d14 SHA-1: 01285f893faf9305cd62d2085103b350e9120a26 SHA-256: afbd88176a643f0d6c65ffc5a1bc64f98b5e0a1dea90520c4b44ef7a6963c157
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 by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to reference 'Consumer reports hearing aids issue', likely a lure to disguise the malicious intent of directing users to potentially harmful external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=consumer+reports+hearing+aids+issue PDF link annotation
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/sepusibofekabe-muzik-wetevawipomu-lulopiwuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_5fe70b585e098.pdfIn PDF document text
    • https://xezelugewopisaw.weebly.com/uploads/1/3/5/3/135311865/tojopesagiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5fe6138253af9.pdfIn PDF document text
    • https://kexujutexaz.weebly.com/uploads/1/3/1/8/131858540/gijameda.pdfIn PDF document text
    • https://cdn.sqhk.co/pidefatop/jg6ihia/how_to_get_msi_afterburner_overlay_in_game.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/jjhhiga/kunuzivaxizebovatomenakuv.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/hhdgdie/tujavuvig.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/fegesigizukupub.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/pifRqhb/dream_piano_tiles_mod_apk_android_1.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/a96864f1.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/pewebopufupe/defying_gravity_piano_sheet_music_musescore.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/car_driving_games_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/kpmg_integrated_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/lepaxux.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_off0000ee59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 5244 bytes
SHA-256: ebab1bf44f546b4ab4b1875d18a66eb2f56e5145e62f4666ef420a0b23fe1a3f
font_01_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 10440 bytes
SHA-256: 764daa295df24bb79d9d63aa44c48740b3933bcfe41be4e14facd1479552aaa6
font_02_sfnt_off000123bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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