Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3627c3d8f9b97e…

MALICIOUS

PDF

80.1 KB Created: 2021-02-26 00:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: af0012df75136064d9713b03395d03a1 SHA-1: 427849e475099de2eb792a7afecd887cd1ce32c5 SHA-256: bc3627c3d8f9b97e1cf73c4ad6d4e6e76c848b8907590b92e24f5fa893aeac56
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm designed to manipulate search engine results. The embedded URL `https://baarspo.ru/wix?keyword=my+big+toe+pdf+portugues` is likely the primary lure, directing users to a potentially malicious site. ClamAV also detected this file as `Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0`, further supporting a phishing or malicious intent. No scripts were extracted, but the overall structure suggests an attempt to drive traffic to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://baarspo.ru/wix?keyword=my+big+toe+pdf+portugues PDF link annotation
    • http://yandex-delivery.cc/braiding_hair_salon_in_orlando4ru8s.pdfIn PDF document text
    • https://zizovelet.weebly.com/uploads/1/3/1/3/131380569/bopagoxuwexopilopafe.pdfIn PDF document text
    • http://copyrighthelpptteam.com/kamowofarujafobupinekpq3t2.pdfIn PDF document text
    • https://nutiduvurenomal.weebly.com/uploads/1/3/4/6/134681926/takutubawe.pdfIn PDF document text
    • https://nifakisafuzum.weebly.com/uploads/1/3/0/7/130775286/ledekapofik_gulosete.pdfIn PDF document text
    • https://nixemuro.weebly.com/uploads/1/3/5/2/135299514/2884873.pdfIn PDF document text
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/a2b0be0.pdfIn PDF document text
    • http://pelistens.xyz/jerisasesaposofolodelov8ijt.pdfIn PDF document text
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/mevixonazimodo_bowobesewobapo_wawokedakuru.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/dotivaf/calendar_planner_template_2019.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/a_simple_favour_trailer_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/fractional_exponents_worksheet_algebra_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/vibevoxiso.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/5291946327.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/brain_teaser_pc_games.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/44037552358.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/92256357915.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_off0000f02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02A 4992 bytes
SHA-256: a1d15470d44d9755466b65325455799bb71f80a6fb9bfcd561334c4c30fe72a7
font_01_sfnt_off00010143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 10512 bytes
SHA-256: f7b1d1b2a912dfb2d7f0f8f469e162e6d8e5117cdf7cfd8a6c17dc1e45db45a9
font_02_sfnt_off0001253a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.