Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ca576bf0b318bb…

MALICIOUS

PDF

72.2 KB Created: 2021-03-28 15:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 99c99736831f309fe0b274ae1a004089 SHA-1: 9941c2118c157f6f8decf09982e018297fdb04e0 SHA-256: d8ca576bf0b318bb54907de3e3ad3a6b04f529301258d1cbc18a8be17e8988a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host multiple links on disposable domains, likely to distribute malware or phish for credentials. The embedded URL 'https://jottigo.ru/123?utm_term=contract+of+lease+sample+template+philippines' further supports this, as it uses a common lure related to legal documents and includes tracking parameters.

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://jottigo.ru/123?utm_term=contract+of+lease+sample+template+philippines PDF link annotation
    • https://cdn.sqhk.co/pasepizut/h1jgLYh/62554868437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_602b0645074ca.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/xaban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_60297fc32b83b.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/JmZjfha/supplement_superstore_weight_loss.pdfIn PDF document text
    • http://goduvide.22web.org/90311325055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_601837478ab93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482027/normal_60346835c6077.pdfIn PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/1153229.pdfIn PDF document text
    • https://negazebofukiwan.weebly.com/uploads/1/3/5/3/135318678/tizeli.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/88f8f46eb.pdfIn PDF document text
    • https://cdn.sqhk.co/rolizemixij/hgf9hb8/sefanokatepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_6021f66308810.pdfIn PDF document text
    • https://cdn.sqhk.co/lasetipulos/gfikxeS/star_wars_rebels_season_5.pdfIn PDF document text
    • https://makogoporuri.weebly.com/uploads/1/3/4/8/134868573/6335573.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/41db502f-61aa-47ce-9b78-f2cd3350edaf/15783158000.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/original_bhagavad_gita_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac8dbed1-ac9c-4d4a-90c6-e4bb86090f03/zizemibegiwotagufexiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/420381f2-e4bf-453b-939b-0dccdb78ea35/beowulf_a_verse_translation_seamus_heaney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8063841-d43b-4168-ae55-b999bb39402c/89615906370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf40dfb-4b59-416e-ab6a-de854a7122ea/pimukipijegog.pdfIn PDF document text
    • http://jiranonule.rf.gd/2764705620.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_off0000de67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE67 5160 bytes
SHA-256: d36501132135d1a37a8354cce2abcd64bc7bf6e1cf2970771577f825387a6279
font_01_sfnt_off0000efc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC8 10312 bytes
SHA-256: 3c8d1047d7c5b5f322adf7984c135083c3fa0ff0e98fc0278a415dd27ff6de23

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