Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae128d81a184ec08…

MALICIOUS

PDF

81.9 KB Created: 2021-03-09 18:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b2dce086a75417a16e2d4e81d9722e03 SHA-1: 9f8c68f824f33162cb3e454b37e623af7b6c569e SHA-256: ae128d81a184ec08e1ca2e4f16af85c43efaea588d8712008f2180e4942eedca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting it is used for phishing or to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the document's primary purpose is to host a large number of links to potentially harmful sites.

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 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://xajibur.ru/wix?keyword=boone+nc+tv+guide PDF link annotation
    • https://cdn.sqhk.co/detazido/gKQhage/dizulafisukabovoj.pdfIn PDF document text
    • http://yourlivehelp.com/fofuzofejozogolkxg1x.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/i0RYhgs/72393143621.pdfIn PDF document text
    • http://hisgohar.site/80953481160gyr99.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/gbjdJhg/yeezy_350_israfil_laces.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/hhajhgt/masamudun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_6041d0321a45b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_5fd9b89d86fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_602aa4f8c4120.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/sarah_dessen_dreamland_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/GJieRhd/58701379787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_6010c679b9ffe.pdfIn PDF document text
    • https://cdn.sqhk.co/dabigewom/344A6vG/my_mobile_usage_spark.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_602fc4b31d200.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/ehjkjif/smart_balance_butter_spread_nutrition_facts.pdfIn PDF document text
    • http://dragonflysagewellness.com/choppa_name_meaning_in_urdueitwr.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/echo_cs_590_chainsaw_blade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489440/normal_602ffbcfe8802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_600087c52f658.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/fasenitugebovubovefevi.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_off0001057c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 4700 bytes
SHA-256: ce0236d6bad03444768de9dac9745c030e3618d85c710e93b80abaaeabda3cd4
font_01_sfnt_off0001159e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159E 10952 bytes
SHA-256: 57f54386245515ce85e897df0e11d50bd9e0a3f303e2f0742c4e2d747928965e

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