Malicious PDF — malware analysis report

Static analysis result for SHA-256 688fdf0f6dc6219d…

MALICIOUS

PDF

96.3 KB Created: 2020-11-16 19:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d63e4f3fb554e8b09661b1c776976855 SHA-1: 96b853b7484612a4ec8239b8b5ca78b20a6cd3a0 SHA-256: 688fdf0f6dc6219d2d39216850abdc6240b08063472823d0ca3b73b48a53dd95
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 0.9997

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://traffine.ru/123?utm_term=oregon+board+of+pharmacy+newsletter PDF link annotation
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
    • https://votuwokikinoso.weebly.com/uploads/1/3/4/4/134466575/lexol.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/bf54213902ad4.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/rukasukotopadawilul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/67729ed8-7671-4937-a82f-c3d7d8492ad8/kefinibuju.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/84820948615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3036a4d-32be-4ede-9feb-63c6d930321c/directions_to_rocksino_northfield.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56dba02-6e20-4073-86dc-9a949f241403/wowisamotusak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa4604b-3e61-4bd6-8959-96df18ef34de/80179559126.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/zuxexilamep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc3ab8e-3659-47c5-bc48-04d217127edd/jacques_tati_mon_oncle_film_complet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0a2c47-6adc-4087-8dbf-85f830727df2/iso_crystal_isles_resource_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf10a0d-71c9-402b-bed5-0b0c7e158b29/47952730205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59596dce-d787-4fcc-9d5d-e40afa9f4521/ninexulisidebojeragodukum.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/divinity_original_sin_2_companion_build_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422fc716-7230-4078-8ed8-9b2abfbcb195/juwekekadirunosowedodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c008e74-91c2-49d6-ba07-c8ea5f4d286b/one_of_the_lasting_effects_of_the_vietnam_war_is.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12774 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00013769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13769 5932 bytes
SHA-256: 33ff448569592b1eb6f3f73b2894d7deedc07f9ae5fa2fa9ed3e99d265f8f7ca
font_02_sfnt_off00014b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B84 11868 bytes
SHA-256: 2740a48053ee505368ec1e93367a566abcbba3c6f26b8c8b85540f8e0048c427

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