Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabec229d3524f4c…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 22:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a5d1835b632534deabdb1ea2198f0710 SHA-1: b8f127c8120d404ebb4b3b2c6df6cb5f644e41af SHA-256: dabec229d3524f4ccb4b681a27a90164dd7b763b627e66e9e6676c2fcaced8c2
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 0.9998

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://lozipotod.ru/123?utm_term=ejemplos+de+dialogos+informal PDF link annotation
    • https://cdn.sqhk.co/sirejeforox/U0NumBc/best_dj_player_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/hdhi5EE/tijuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fcaf5a81ac5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477173/normal_6018f5992b359.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fdffd1dda084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_603593169d7d2.pdfIn PDF document text
    • https://lasogevedona.weebly.com/uploads/1/3/1/3/131398076/kibibejubejukuv.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/TgjgdlA/temple_lost_snow_escape_chapter_2.pdfIn PDF document text
    • https://devojakosumu.weebly.com/uploads/1/3/5/3/135314674/4644040.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/adgGrhi/61858080885.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/jdwheOd/football_heads_champions_league_2017-_19.pdfIn PDF document text
    • https://cdn.sqhk.co/magatile/DKjjjht/4851739416.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/hbjf8hi/monkey_go_happy_unblocked_2.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/cojbzgj/98842644808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5fd39ab3e3bd4.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/Mjdicii/rutikivesuzubasim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 5396 bytes
SHA-256: b5a2afbf325644a807d72d6c2714beb19c369de40bb3c07077cadb389f9dc6c3
font_01_sfnt_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 11536 bytes
SHA-256: c8332a20aff5a3d328dd4131754490af7cc8c7b44aa8f6813ebcb857abab76a6

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