Malicious PDF — malware analysis report

Static analysis result for SHA-256 0423e0ecd1d8f2d6…

MALICIOUS

PDF

71.4 KB Created: 2020-11-14 03:34:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8b5cda6feff0abdafe6f29ac9c98648d SHA-1: 007502163b3b81b5b33f76728d3902877c8e8465 SHA-256: 0423e0ecd1d8f2d6142642b334334d97d92fad1521597ce0a5d046609e26c0d1
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs, such as 'https://gettraff.ru/aws?utm_term=cheat+droid+pro+apk++aptoide', likely lead to phishing or malware distribution sites. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or trojanized document.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=cheat+droid+pro+apk++aptoide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_5fa43966bfce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f893afc006cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f89eff94e90b.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/fegetururiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381997/normal_5f8e7a6c79c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_5fa84cf8c5355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_5fab2b2ece15b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fa7b5d7439e3.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/fatisake/58542964014.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/dubezalevidom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b3a8bf-f0a2-4461-a580-ca7264f84876/bidirejobanozopafanel.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53A 4804 bytes
SHA-256: e7ef7ed95b282dd6dd486cfea5a05d8b9a68b781f5bf9575a7952256866ce42e
font_01_sfnt_off0000d587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD587 11032 bytes
SHA-256: c4d8fa591f5de98fcd038ef5a368c0473b8f7598425bfe41c4583edca456d376
font_02_sfnt_off0000fae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 16264 bytes
SHA-256: d87d1747d4f8eddc0495f5def6875e09bd5844f6416e2426598bf9f1b2a9cfac

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