Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04397c109a2917a…

MALICIOUS

PDF

68.5 KB Created: 2020-11-18 22:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5115910451299ffe5ad8be1c2d733764 SHA-1: 17274db94570352256371079b316367a34fa90a7 SHA-256: e04397c109a2917adac5cb37f488cabba625c000b2d7bba79f0fadd8d5fcd9a4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing numerous external links, with one heuristic specifically identifying a 'PDF link farm' pointing to 30 external PDFs. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL `https://trafficel.ru/123?utm_term=ionic+or+covalent+bond+worksheet` is likely the primary malicious destination, suggesting a phishing or malware distribution attempt.

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://trafficel.ru/123?utm_term=ionic+or+covalent+bond+worksheet PDF link annotation
    • https://kivojiwivumupu.weebly.com/uploads/1/3/4/5/134597008/beminetib-tevalida-kotubako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_5f9b0993b7410.pdfIn PDF document text
    • https://nugaramavamog.weebly.com/uploads/1/3/4/3/134320686/resijutaminutenod.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/nowokil/free_spells_for_attraction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ca8c4b-7501-43f5-adc6-c35aaf92e210/koleg.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/mathematical_reasoning_notes_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e849a54-a62e-4d52-ba1f-938e2615736a/84060596178.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/biparegaginovorot.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/94339887790.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/free_cad_systems_rp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b350c56-e0ad-4ae1-a1ee-f07d5b30400b/buzatijetagolitokatoxub.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/the_kidnapped_prince_the_life_of_olaudah_equiano.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/fewumanulufonedewijulera.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/levupovufixupanob.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/29196730486.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC308 5108 bytes
SHA-256: 67bfb7a36e1a6ac0bf8a59db20a2ec1dec51f9c2b892b89586d321125b3c3992
font_01_sfnt_off0000d461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD461 10196 bytes
SHA-256: 529444632e0a4af2d6a3846c0f239bd945a39321384c2986e1e92985122f17d2
font_02_sfnt_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.