Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad5f5bbc8449996…

MALICIOUS

PDF

72.3 KB Created: 2020-11-21 17:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7c1aaf72645b98fb75b53464f15b3c51 SHA-1: bf42c225a01689612fbfb084d8fcd54984dca980 SHA-256: aad5f5bbc8449996351be064359560903b79522da098f9a158732bf092150272
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-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.
  • 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://trafffi.ru/123?utm_term=select+organics+garcinia+cambogia+weight+loss+patches+reviews PDF link annotation
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/jejuroletadodufana.pdfIn PDF document text
    • https://fejalunaruxepiv.weebly.com/uploads/1/3/4/4/134489653/sidadikozonazoz-puvuwagomeda-nopamesaw.pdfIn PDF document text
    • https://bufivenejolerad.weebly.com/uploads/1/3/4/7/134709937/8986459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450152/normal_5fa1cfbeaa8e4.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/xoxaneral/hashimoto_s_protocol_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a35697-6570-468c-a71c-52b0f5afdd20/flag_shadow_box_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2777bb6c-1c30-403e-ace7-9a8b731da24e/vugijifefokiporofiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720aa501-dbe4-4076-bf41-6838b0d57987/7293254338.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/flute_scales_and_arpeggios.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/canny_edge_detection_matlab_code.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/youtube_music_premium_free_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c0b82e-b4a7-4b33-94bf-527df5bc8b1d/origami_dove_printable_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/the_book_of_belial.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_off0000d3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D3 5532 bytes
SHA-256: f792029e62ca6e05340d5b33d8959dd675cebe361c6ba3df9d5040b8b93690e5
font_01_sfnt_off0000e670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 9212 bytes
SHA-256: 99013abc2ad289d60d03d6859dd26698372dab300716926edc499ce36d799e5f
font_02_sfnt_off000105c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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