Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e00eed487b5f461…

MALICIOUS

PDF

75.2 KB Created: 2021-03-29 02:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1b6ee44dfbed9d2684e0100dcd996f58 SHA-1: 6fd4f72a20b83e577b086d93fcc615f1809ea492 SHA-256: 7e00eed487b5f461761234f5a0eb695a35c4bc0cb75a643c382064923a6235fb
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a common tactic for distributing malicious content or conducting phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the nature of the link farm suggests it is designed to redirect users to malicious sites, potentially leveraging embedded JavaScript within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://seumenha.ru/award?keyword=poemas+de+amor+alfonsina+storni+libro+pdf PDF link annotation
    • https://konomotawet.weebly.com/uploads/1/3/1/3/131379362/tuxegemaripus.pdfIn PDF document text
    • https://sugovodeko.weebly.com/uploads/1/3/2/6/132681033/6201348.pdfIn PDF document text
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/zorulununugutewip.pdfIn PDF document text
    • http://markettop.pro/guguwiwonemeditodunomezedbwezq.pdfIn PDF document text
    • https://kixumiziri.weebly.com/uploads/1/3/2/6/132681985/5100764.pdfIn PDF document text
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/25a75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_2bda0581dd834ffabfb2dbc17c8e54c3.pdf?index=trueIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_3aa594cf83054bc09e44ef0ffab66a0a.pdf?index=trueIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_43c2210d83014386ae5d2cb64313a9bf.pdf?index=trueIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_34f98bd4013c4902bc0bc01ef9ff0516.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f82af59-ad13-48d8-a131-637fc6177e2b/how_much_does_yamaha_keyboard_cost.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_6a2fb57e10de4f71a79a8005b7d8f7e7.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_6958eb6ef6db42119a0cd114d0d13473.pdf?index=trueIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_8bf00197c62c401b961f362f284bcfe8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/magoladob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d071b24-4da5-4af3-93d9-bb8f7235e10c/simple_java_rpg_game_code.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_off0000e76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76A 5328 bytes
SHA-256: b353a0786a9b2ccd517f38f031a25a5347eba25f09109bf1146fa9f968ce6186
font_01_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 11776 bytes
SHA-256: a7111d33d4b7ef2bdf6c8067f5eea0ee00954219926b71e0c7a3361a9d5fcc01

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