Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca685e46b060c94…

MALICIOUS

PDF

64.7 KB Created: 2020-11-19 01:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 68accc9acb357d79d8e1905ac0b880a5 SHA-1: d7f664daf5f7f0c7f4bf49303d93f07ac0c56898 SHA-256: 1ca685e46b060c94490ef82bb79d1e9c57281f3a0796dacd8a7740cd332c1792
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://trafficel.ru/strik?utm_term=verena+maschke+baile+aer%25C3%25B3bico PDF link annotation
    • https://rubisese.weebly.com/uploads/1/3/4/5/134589844/pepawagaja.pdfIn PDF document text
    • https://sojebubibofanex.weebly.com/uploads/1/3/4/5/134512436/vevewepidife-luxilazavugube-kugakubit-soluzuboropu.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/9562653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f8e8a7d58bb4.pdfIn PDF document text
    • https://baminivosawu.weebly.com/uploads/1/3/4/7/134701136/5313956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5fa6af7df033d.pdfIn PDF document text
    • https://zemaxixose.weebly.com/uploads/1/3/4/6/134636511/ae26f9821102c17.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/temujonuwu/awlgrip_topcoat.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/lalujumuzotoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6477da-a79e-4e40-a744-57394bdfd2dc/67044069127.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/dewalt_dc720_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/blanche_neige_grimm.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/broken_vessels_lead_sheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAE 5344 bytes
SHA-256: 0ce025d03a7b5ec101061974089632a4d911224ec608c5a0f7353c8fee248b4e
font_01_sfnt_off0000d172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD172 10496 bytes
SHA-256: 83a2b1ca441ea328b3aed5c9e504c5d0cd594d39c7c0e45a976fe53bd3eddbcf

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