Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3363d6d8586c98…

MALICIOUS

PDF

72.3 KB Created: 2021-03-16 08:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 390e81b748ffd8baa7b1c5211c350d92 SHA-1: 54f5bfaa5e72f9b91fe407f6709f392f9feeb258 SHA-256: ae3363d6d8586c98934143958c00c0f6faf06e7f023fead32d0386c0666bfdd8
186 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with many links pointing to disposable hosting and potentially malicious content. The primary URL, https://soxebez.ru/wix?keyword=motorola+talkabout+250+manual, suggests a lure for users searching for specific manuals, likely to redirect them to phishing or malware sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://soxebez.ru/wix?keyword=motorola+talkabout+250+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419642/normal_6034640fd2ce0.pdfIn PDF document text
    • https://cdn.sqhk.co/batovafakupo/dWjdhiK/xoninoxanifire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_603f2b16b6b1c.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/d83cUqg/starting_lineup_for_tomorrow_s_race_at_daytona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_5ffefd4551c80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421342/normal_5feea509ea486.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/svegixr/rumble_fish_sushi_montclair_ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408706/normal_601b8a2ae1e2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zulanow.rf.gd/chess_openings_for_beginners_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c68cb7d-f8bc-4902-b9be-4bdc30732681/65483094492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557ff9e0-1755-444f-8845-8a9f326a5bb0/telupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab910139-6a62-473f-a382-bec0ad910d6d/71293586316.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_e22f7f346e7c4d878e8e9f35b048b4d3.pdf?index=trueIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_868d1d3a503443758bc97e34d2c69aa3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4722e50-9c84-441f-879d-739c19ed262b/rininemoliwadufadilozorix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d7035e7-1928-4928-b6a1-bd2dffd5b6a0/dabosajiv.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_9d9802a303d6478ab7ea114dbcfd58a4.pdf?index=trueIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_941524bd522b4ac492e709f035d5b770.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f56f26-5a70-4f2e-bbec-2ee534a40ce7/jixor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df335295-7ed4-429b-b95d-2c5e24cfd303/cordis_vs_central_line.pdfIn PDF document text
    • http://nataxos.epizy.com/bunker_hill_security_light_harbor_freight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02871815-bc44-4f24-a326-a181a8b50f0b/que_quiere_decir_un_estado_social_de_derecho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f3571d-d1d4-43c8-9bd8-a24519ad951c/pakogaperafikajamakumid.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_off0000d757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD757 5260 bytes
SHA-256: ef5d9a4af58996dfd92f07f25476d69df0c09ce4c7ea8950e57ece6e86959cef
font_01_sfnt_off0000e935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE935 13248 bytes
SHA-256: 036a719a68e22b754a63c2611d64d4ec15878c7aa82095a8f4c3fcf3c1eefb6c

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