Malicious PDF — malware analysis report

Static analysis result for SHA-256 f453228731468613…

MALICIOUS

PDF

68.8 KB Created: 2020-11-20 03:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bf56bbf2b599a686ab22fce437d07da5 SHA-1: 2d3b84e50b8fa81a3087b82d630ea0ed9b0b4d16 SHA-256: f4532287314686131c0456df493642ba986acb2c400877e40e86b2403df95342
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://traffine.ru/123?utm_term=stuart+hall+the+spectacle+of+the+other+citation PDF link annotation
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/nowimolowime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5fa72ec86a4c4.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/lotokodaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f95041ae1d56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/moderator_guide_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/sounds_of_music_science_olympiad_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/11567861325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95cc599-56fe-4895-8ef6-024722cc03eb/sepukotudatuninilolevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e72ecf-98bd-419a-952d-c92c4c1fd987/52107481010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e33ee2-1b5a-4876-8b5f-915a518c20f1/samigodugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/016ed51b-353a-45b2-9510-3b22253fb78d/automotive_technician_job_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbc50fa-f85b-4b4a-be68-f8b908e36e01/fovarogubifowujas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77826eb-4280-4100-ad79-94c62cca021d/nasijiwesixebuvimux.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/83588834937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02cb667-8fa1-4d14-9c5b-3421dfb92a73/zamerirutupulufupok.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 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD050 5208 bytes
SHA-256: 6dcb6c6fafc6eb4887955599a8f6051568dc9dd538977c7a1f5e37cca0194f2a
font_01_sfnt_off0000e202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 10500 bytes
SHA-256: e9cb033a74b49fcf24742aaea9887fdbaa31f31657dd1e41a5a9883d176b7a3d

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