Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac36c5f68a748980…

MALICIOUS

PDF

74.0 KB Created: 2020-11-20 07:10:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c56b426dd9df4982ebe6b85a58a6f56e SHA-1: d31b0272c0dfd932ad1fed48053ae5da8ca2727b SHA-256: ac36c5f68a7489802e5266db380c6bf906753bd241bb3b2769422252f04b0611
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/123?utm_term=boise+power+outage PDF link annotation
    • https://bujuwevirovumeg.weebly.com/uploads/1/3/4/2/134235487/1186206.pdfIn PDF document text
    • https://gumebasa.weebly.com/uploads/1/3/4/5/134509515/6826837.pdfIn PDF document text
    • https://metumarexidema.weebly.com/uploads/1/3/4/5/134591821/8c59658b490a.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/89aefdb.pdfIn PDF document text
    • https://datevapo.weebly.com/uploads/1/3/4/3/134338939/0d07ff.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/tudazanumabawag_gevaso.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/76592.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sixolose/big_fish_games_manager_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/mp3_download_free_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/101397032.pdfIn PDF document text
    • https://s3.amazonaws.com/nujosuwemedadi/tipo_de_daltonismo.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/zimagikezibijugediwud.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/nerekijogidumadup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4988f5-e8dc-4cee-be8f-3d883d9ad06e/52333059370.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/92674198492.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 4872 bytes
SHA-256: d4d2179dc3482767adc207be9a140b48fd6908a2dbb23036affa36ecbde781b4
font_01_sfnt_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 10044 bytes
SHA-256: e549f906cb3ab500c061553442d312a4f4c11305356c8a63b5da32b1252c446c
font_02_sfnt_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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