Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc152897996dcc36…

MALICIOUS

PDF

75.4 KB Created: 2021-02-22 10:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d3ca6f827b82ec8e037ece6f6d6e2849 SHA-1: 8134c8fe210f3714a54e1c9a9df7bc8929e8d1ff SHA-256: cc152897996dcc36b384fd0afdbd89b203190f968d29ece6fc52738c548e32fe
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting or potentially malicious domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites.

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://jacksth.ru/wix?keyword=cartel+de+los+sapos+anestesia PDF link annotation
    • https://jasasexu.weebly.com/uploads/1/3/1/1/131163864/4680771.pdfIn PDF document text
    • http://vinnipoh.space/pueblo_en_vilor0na6.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/ibNgeSe/79393070264.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/OjerjfT/75584066509.pdfIn PDF document text
    • http://olipaka.xyz/davidiwolutemovadanirapagehos5.pdfIn PDF document text
    • http://peuer.xyz/2015_lexus_gs_350_f_sport_msrp25o3q.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/jjhgohf/jonotegeduj.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/Zmjckih/chicken_tapeworm_treatment.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/tomaxade/bingo_app_in_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/zosozif.pdfIn PDF document text
    • http://zubeleboju.epizy.com/idioms_and_phrases_worksheets.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/batman_game_2018.pdfIn PDF document text
    • http://lekinip.epizy.com/beginning_and_ending_sounds_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/livestock_farming_project_proposal.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/mere_christianity_chapter_5.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_off0000e0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D8 4856 bytes
SHA-256: b062d29c9a6aa2084054d49b2c79c5981bb0811f91d06cb33226661325512f00
font_01_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 15912 bytes
SHA-256: 77032f21ecb6e845c9bbad34c61fe8b441eb3279c5eca22fcc58ff81e60b8b2e

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