Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3c43ea231df117…

MALICIOUS

PDF

112.3 KB Created: 2021-02-06 14:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b4f7cb25d3ab5e9441db2455d3316e3a SHA-1: 0b1e46a43c6ecd76b577fe130221681bc6d6c021 SHA-256: 2c3c43ea231df117b18107733232337f519c410924809b2728987dfde7fd7680
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=majora%2527+s+mask+3d+fairy+guide PDF link annotation
    • http://delaem-sami.online/ordinal_numbers_definition79cul.pdfIn PDF document text
    • http://lg-copyright.com/xaruvononaymwoi.pdfIn PDF document text
    • https://nexojavadu.weebly.com/uploads/1/3/0/7/130775828/nifidi_gajafudos.pdfIn PDF document text
    • http://tidemelewofu.iblogger.org/pafebipomuzuvom.pdfIn PDF document text
    • https://cdn.sqhk.co/xazewizol/SGijAQW/one_shot_trick_shots_fortnite_code.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/IghpzvG/viridiana_martinez_gonzalez.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/jhifthh/74784494749.pdfIn PDF document text
    • http://nesobaka3.xyz/the_beatles_complete_chord_songbook3i2kf.pdfIn PDF document text
    • https://xuvivodoxanujo.weebly.com/uploads/1/3/5/3/135308848/vovus_gewolesel.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/zolojolababeb.pdfIn PDF document text
    • http://repair-foto.ru/fundamentos_de_microbiologia_de_alimwlud8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://felawikemuda.epizy.com/27700321678.pdfIn PDF document text
    • http://lubesugoninop.epizy.com/bollywood_movie_full.pdfIn PDF document text
    • http://gisipusizen.rf.gd/41186531076.pdfIn PDF document text
    • http://garulolit.rf.gd/36352859982.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14416 12828 bytes
SHA-256: a09d7d594e2efdbef07c718612eabeeed00b8701ffcfe8f452637f34a77db1e0
font_01_sfnt_off00016e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E8C 5336 bytes
SHA-256: 02ed6069addaff4ccf0a65a3366edcfa08bc4aea0e8792385cb6f206d6e14dbd
font_02_sfnt_off000180d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180D2 10588 bytes
SHA-256: 19601b402692541e4980262ae8de8fe6ec0a8c0903f7d82568a2f50f622412e8
font_03_sfnt_off0001a51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A51B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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