Malicious PDF — malware analysis report

Static analysis result for SHA-256 f770186c2427bdae…

MALICIOUS

PDF

67.1 KB Created: 2020-11-10 04:06:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e7036bd5b8ecedbf94600e7531c70e8f SHA-1: d90de70576cc0a79522df2025eb582f8f8db8981 SHA-256: f770186c2427bdaec4f04802c1407404dea3d9d471eb737213bbac70b6e7c651
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://traffnew.ru/strik?keyword=moose+jaw+free+sticker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f8a57ec5c5ce.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/sufikijuvolibup-sumikaturuxamos-rerin.pdfIn PDF document text
    • https://kodopikowi.weebly.com/uploads/1/3/4/6/134659436/7213432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f939bb85def9.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/kabisebax/papa_games_unblocked_77.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/39682148461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4362e6-ee53-4076-b031-d483df63df09/boy_uzatma_forml_kitab_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/halloween_activities_for_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aabd382-0239-490a-9597-cf0a836022a7/dupagojujiwupowuli.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/virgin_killer_sweater_sims_4_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/26099555413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69737774-07f6-4e61-9156-233d3d46c938/61332690929.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/naruto_shippuden_episode_179_english_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/jurnal_ampas_kelapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ca9c65-b63d-4ed8-909b-c2cbaef1b5e4/89018275947.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_off0000cc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6A 5080 bytes
SHA-256: b87e5cc0d610901b2022fb7e55adcd0b2b4777433b1b7a7966878c5d71a8685d
font_01_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 10544 bytes
SHA-256: 342ae45e2ed812868f44c5ac6540930312af8efc6e50aeedcbe57df68f1744ed

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