Malicious PDF — malware analysis report

Static analysis result for SHA-256 7956aa6d4de602c9…

MALICIOUS

PDF

76.5 KB Created: 2021-05-29 04:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d0f741262755b8047774bed35c6ef45 SHA-1: 0188c34852b33f26e22e57f7ad60889fb7ee8e9c SHA-256: 7956aa6d4de602c945a5095c3934764d5d1cfd5f6fc05d76dfc4671a9836fc29
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 0.9992

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://fokemale.ru/123?utm_term=carranza%2527+s+clinical+periodontology+12+edition+pdf PDF link annotation
    • https://vutipewuzoneker.weebly.com/uploads/1/3/4/4/134472613/6118244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_6041bb78c1104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460690/normal_6000c01e10923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412170/normal_5ff3aab92b8ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469824/normal_603573529374e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403259/normal_5fd70073c9a98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_603572584eb5a.pdfIn PDF document text
    • https://bivovipolever.weebly.com/uploads/1/3/4/3/134347360/tivivipovogas.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4405420/normal_60b123530b739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_60349ac148d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_6068156154612.pdfIn PDF document text
    • https://bumilumijoxaxuv.weebly.com/uploads/1/3/4/4/134497753/7635132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_602ef96f7035c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_6015935d62ac1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5fed0ecaad9b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_6030eab169a7a.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/be5598ac-04de-4e77-bed6-c34c5bb24b5c/book_called_the_body_by_bill_bryson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd18d50-1154-45c5-a3d3-cafe47ef7905/us_army_pistol_qualification_course_of_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9845d8d0-6275-4c85-bdbf-baff4b91daad/98169733857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234a78b4-1434-422c-a5ae-25cb6d2728a0/76188219453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4424ea2f-d633-41df-bc6a-c4261a90bcf9/42434048297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aaf2db8-2d20-44b9-9552-c227b0d50443/18712705610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a3358f-f290-4c41-b959-7ee36349ee99/mezagonigifafov.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_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 5596 bytes
SHA-256: 8519272d44f4ee0712913e9097c69f9f2d936bc8dbe658d3b9bed1129f2fe00f
font_01_sfnt_off0000ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCD 10552 bytes
SHA-256: 0c155cdeb40a8aa13961310fced7a8be1af170192175af4f6e34301541293339

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