Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d03df04378d516…

MALICIOUS

PDF

67.3 KB Created: 2020-11-23 12:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dd497ccef9e7ad3442b132147a7d54e8 SHA-1: 97102271b040af2f1cc32080ede79beddd5525d1 SHA-256: 37d03df04378d5168923c966924f9909f4bf9963ca32fe83db9d18f1ef4098d4
186 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 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/aws?utm_term=sound+effects++for+vines PDF link annotation
    • https://jagamasukibo.weebly.com/uploads/1/3/4/4/134493784/jedikavaxezit-kiwinukufewe.pdfIn PDF document text
    • https://bipasakugerada.weebly.com/uploads/1/3/4/3/134350286/4738700.pdfIn PDF document text
    • https://tibulewozimok.weebly.com/uploads/1/3/4/0/134017320/b86a547bf7de.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/naratozunoluwukin.pdfIn PDF document text
    • https://sutapupimode.weebly.com/uploads/1/3/4/6/134615637/55f8ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f88c99417e4d.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/85af9cd4-4051-427a-8514-c9ce32647f73/jowutizegozufapixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0c3a4f-71c7-4964-87e2-8030d06f2144/learn_to_speak_elvish_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c8086c-7347-43ac-b490-f95255206ec6/unblocked_games_stick_war_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae4d647-593e-46ee-bdb4-102676cb66aa/rijibaxofatiropozapuko.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/bleacher_report_2020_nfl_mock_draft.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/avon_cologne_cars_price_guide.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_off0000cd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9A 4936 bytes
SHA-256: faab6ff7c1332b1076f90ad91efc5b13c63cfd24368e3ea38fa0740d40fd6a77
font_01_sfnt_off0000de81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE81 9984 bytes
SHA-256: 495cc7aafaab3b5565f1a3a82a82a4ebbbeb86e401e68546f0370548b957eca5

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