Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa196a6eadd8592…

MALICIOUS

PDF

54.3 KB Created: 2020-11-08 02:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 130d5b3038cede2af5d56154da225400 SHA-1: 38b99db1cc7d106cfb835818ecef17c1c7161db7 SHA-256: 0aa196a6eadd85922c36688610461b3ffecab654d19d6b419066c7d3750ebb82
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a high-confidence ML classifier flagging it as malicious. One of the primary links directs to a URL on 'traffnew.ru' with a keyword suggesting a lure, and another points to a PDF hosted on 'weebly.com'. The PDF's structure and the presence of multiple distinct hosts indicate a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffnew.ru/aws?keyword=north+american+reciprocal+museum+listing PDF link annotation
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/94713876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_5f93535c8e883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f9870d0729b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://demoxugu.files.wordpress.com/2020/11/hp_deskjet_f4580_wireless_setup_windows_10.pdfIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://sejopaguvit.files.wordpress.com/2020/11/exercice_cod_coi_cos_5eme.pdfIn PDF document text
    • https://vakonowar.files.wordpress.com/2020/11/fire_emblem_three_houses_rule_34.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8eccb1-83df-4c41-8c3b-6247ab45c2a0/duzagizulolexutebadisozo.pdfIn PDF document text
    • https://ripigewub.files.wordpress.com/2020/11/ditukalabekorutasekavoj.pdfIn PDF document text
    • https://zopovamodutu.files.wordpress.com/2020/11/godusawix.pdfIn PDF document text
    • https://dilopipo.files.wordpress.com/2020/11/demetivudaxakoleze.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_off00005ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 17548 bytes
SHA-256: 6ed5107f576e7629f492fec95ef69597413d8ea97253ee893d51d3355d950459
font_01_sfnt_off00009357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9357 5316 bytes
SHA-256: 9d6ca52b8938f7acb78945b93a07aec565ce4db15f3bc42a4a991474d6102eca
font_02_sfnt_off0000a544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA544 11376 bytes
SHA-256: 71e9d4433548ac2fc0743ad965864a41f068a3ca2313da0e66ee226dba052781

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