Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c6eec248a12763…

MALICIOUS

PDF

73.7 KB Created: 2020-11-19 04:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 366535c8c8841f621f3b19d954136ec2 SHA-1: 9c69743ce4453185fa1b9c8d184abfedac283f52 SHA-256: 20c6eec248a12763b03ccea6b996d7401c668ffb2df299f06d4e68f2eccd34d9
116 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. It uses a QR-code lure. The file embeds external URLs that direct users to attacker-controlled resources. 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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafftec.ru/aws?utm_term=flightradar24+pro+app+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5f90e47e568c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8a19fd926b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_5f9ec9c7682b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f9249964d6be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f94ebc97507a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f9a581a86c1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_5fa2733c746b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5f92f852c414f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f95cafe74265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5fb4721905574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f87ad7200148.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/jedobufudajewu/cooking_fishing_guide_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/binomial_calculator_online.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_off0000d70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70D 4980 bytes
SHA-256: 7455fc6aec1fb667611de7f1bd318bdb510429f244ef2e2b5cd88f347a2f75d1
font_01_sfnt_off0000e81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 10556 bytes
SHA-256: 2864c491713cbf7bfb8e0e1a4ee063c832f15a5973318d5811b77de406a48411
font_02_sfnt_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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