Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d72bb879043a8b4…

MALICIOUS

PDF

69.3 KB Created: 2020-11-17 08:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c991641485a8ba4d620f5ce219f28cbd SHA-1: 213ff867e8fae3993f75b75d7e91fe1e29ad5aff SHA-256: 6d72bb879043a8b479a095442d01781bc722810d0ed7b8b0ae62d2793ccf855d
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 0.9997

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/123?utm_term=ima%2527s+statement+of+ethical+professional+practice PDF link annotation
    • https://bekujorukop.weebly.com/uploads/1/3/4/0/134016765/sutedatevipubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_5f9ab8fb70366.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/dusubonifu/siklus_hidup_nyamuk_anopheles.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/free_printable_certificates_of_completion.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/salt_and_sanctuary_grey_pearl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4af68b48-8105-42e3-ad18-31f2e25630e7/ranadanosirawexutewem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2944a3c8-b6e9-4bd7-9654-f89dbb494d9c/91910951503.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/viruvorutopof.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/pomifemozerazujofijutaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/vimivudedason.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e8d7fa-4f16-47f1-b6f8-d11c1bd40a62/2448177350.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_off0000c567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC567 5016 bytes
SHA-256: a2b9ad80c077a135c86aaf5a916a1c3c389ef55a395a342bb8143c41c73ad157
font_01_sfnt_off0000d639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD639 10144 bytes
SHA-256: 1d5c0ba460fd9e49db5d038971c99934aa72156239611b3bed59b925269ccbfa
font_02_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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