Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7ef12068a6a45d…

MALICIOUS

PDF

72.3 KB Created: 2020-11-16 14:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: deb4bf317ef8c118559819d93d632b52 SHA-1: 97cd24a9127d72203aced9cc453db5adcee7a0fa SHA-256: bb7ef12068a6a45d917a293ae00ad42ee22cd06584b4e322a4beed9e449c0b23
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?utm_term=fast+and+furious+7+720p+dual+audio+free+download PDF link annotation
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/veliwaz-vuvaxenumudo-jamevivofa-lukebotidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_5fa17b2712f6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_5f9d8715a8224.pdfIn PDF document text
    • https://zodebosamu.weebly.com/uploads/1/3/4/4/134444592/kamunejoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476268/normal_5fa6a092e3f87.pdfIn PDF document text
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/resodetenofujafijupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_5fa9ac80c44e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5f96508981000.pdfIn PDF document text
    • https://kulirudezu.weebly.com/uploads/1/3/4/5/134583820/2406874.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://uploads.strikinglycdn.com/files/b7b43919-ca7c-426c-ae10-fd9355e08093/62730651381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0cf873-7f5a-472e-92bb-cc0cbcc84422/banasiriguzibam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/718b6668-cf59-43a6-bba3-751735081473/3942504567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4c810f-5103-47b7-b2c4-f46b791a872e/guvor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13358d71-6bef-44cd-b527-f02e24ac12df/xijusarexikuresid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d85b0ad-a1cb-4084-9259-c0822078c811/dezaemon_2_iso.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_off0000cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 5320 bytes
SHA-256: de05e18da351c72ec40ed3fd39d372a817d8ff25fe1e4e7e65f73d0ffa712ecc
font_01_sfnt_off0000e161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 10504 bytes
SHA-256: 874244053c8451b0d85c256b9c0a66e822dd3834a16fb957f09c1448f43d43e3
font_02_sfnt_off00010567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10567 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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