Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05d05ee810eaccc…

MALICIOUS

PDF

74.2 KB Created: 2021-04-04 17:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 99cff7b7f0b7009cef3b6d352a55f14a SHA-1: 27288498fea986877d367a0426b701341a197649 SHA-256: a05d05ee810eaccc14f057dc29bd24501f8b63846bdbefa804cf83242c6d4220
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to the 'Mondiali di calcio 2020 calendario pdf', directing users to external sites for potential phishing or malware download. No scripts were extracted, but the presence of numerous external links points to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/award?keyword=mondiali+di+calcio+2020+calendario+pdf PDF link annotation
    • https://cdn.sqhk.co/xujurovemu/gVOmha3/mezomelisod.pdfIn PDF document text
    • http://morj.space/what_is_a_soft_touch_footballd9fcp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_6043f9957e9d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_603eed6013776.pdfIn PDF document text
    • https://cdn.sqhk.co/lusesito/AglPich/doomsday_escape_level_9.pdfIn PDF document text
    • http://greatholl.com/45623118752m538f.pdfIn PDF document text
    • http://help-violation.com/598215293346xdsj.pdfIn PDF document text
    • http://milanomoda-italy.website/lirexese0rowy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_6024ed552d6a1.pdfIn PDF document text
    • http://medway24.com/79924393243ok8az.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/nz9KhdA/japonaruduw.pdfIn PDF document text
    • https://gunajogozezulom.weebly.com/uploads/1/3/5/3/135385825/5689133.pdfIn PDF document text
    • https://mezamelakinates.weebly.com/uploads/1/3/5/3/135304028/36f032b.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/rhdgige/nuvaritiv.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/515a0454f43cd.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://uploads.strikinglycdn.com/files/aed60af8-56d1-441d-bf81-09681806e792/50584056014.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/49202742291.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/photoshop_cc_background_images_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/95099773770.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/xesif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ef4e2b-ba67-4f2b-95ff-5e35d3333115/zajabuxakugivarefusefav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e6920a-64bc-47e7-a55b-b904aa8e6534/20485986836.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_off0000d882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD882 4960 bytes
SHA-256: 10a287296f95424dd2a2da086eba0f3bd4a051b43d5a49d743d846781cb6dca9
font_01_sfnt_off0000e961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 10812 bytes
SHA-256: 063dcc14315927a1bdd124fbd859af8eec57f1134e8236f190164249e74743a6
font_02_sfnt_off00010d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3