Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ae0224c0096c4f…

MALICIOUS

PDF

80.3 KB Created: 2021-04-04 02:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b43432f1d7b07b141d24f8611b79f1eb SHA-1: 42f9cc1b516d4bae89d7a2e3839e82fbc4f48f61 SHA-256: 84ae0224c0096c4f62dba62e09a08841cda6c02e1e66a65be1a2727998f520b2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and potentially malicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=revocable+living+trust+amendment+form+wisconsin PDF link annotation
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/xerefasi-kibotewuw.pdfIn PDF document text
    • https://xovonanukotu.weebly.com/uploads/1/3/4/8/134898985/zibodetewafowez_ziwiramojapep_fitove_saxuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_6036936e5cb47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_605c48382c31b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5fcaeaa1e92dd.pdfIn PDF document text
    • https://cdn.sqhk.co/xarupozikala/eMq1kgi/box_office_tycoon.pdfIn PDF document text
    • https://zuwojutiraz.weebly.com/uploads/1/3/4/7/134729165/3814594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_60607a9be3efe.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485572/normal_5feb67363773b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_603a8a9a7bb79.pdfIn PDF document text
    • https://cdn.sqhk.co/lebinezekoma/gj2ibVc/amazon_alexa_echo_2nd_generation_setup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_5ffc9170cc064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465543/normal_5fda5cbc98ba6.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/PxgeMHA/fenofibiferosagomamit.pdfIn PDF document text
    • https://fizabogozof.weebly.com/uploads/1/3/2/8/132815807/17e91ee95c4d.pdfIn PDF document text
    • https://cdn.sqhk.co/farategibod/yijjcii/bekigejilizixupik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a694b983-b5f3-4459-81c1-91e1c3ee52dc/more_than_me_meaning_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5679a40c-0fc0-4565-beea-5d3589cb5a91/vetofopotovedoj.pdfIn PDF document text
    • http://vopepogam.rf.gd/23004946245.pdfIn PDF document text
    • http://mitumuxujo.rf.gd/zubanegofarizur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6761cbca-2c21-4b55-881d-2f34bf43388e/will_hydrogen_peroxide_cure_athletes_foot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0134bb-2aea-446f-930e-597280c97824/58282693638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f8cb34a-d411-4f69-a5c7-434859abb4a5/lubawotalufifufemov.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_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 5640 bytes
SHA-256: 1f4f48dc45bfe97d381a21f549150a7f699d5d96abcbbe5b7b5ae23f8755662a
font_01_sfnt_off00010bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC9 11060 bytes
SHA-256: b4cf95d9800686dd93fc5779d78fd8892445b98d6f7faab52442557a1f08318d