Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d6bd7964aee1c2…

MALICIOUS

PDF

73.8 KB Created: 2021-02-21 10:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4abde8aaa5e4ff05670276cbd1f8e700 SHA-1: a916bdb517911ea04c1bb43c21026c5361d21066 SHA-256: d5d6bd7964aee1c2c32010e0de7645b0a31bd14b39ceca2a6ae8f432d4d003e4
186 Risk Score

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://jottigo.ru/wix?keyword=poweramp+apk+old+version PDF link annotation
    • https://cdn.sqhk.co/zojixemem/ggc2jgf/family_farm_seaside_aquarium.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/6xlijck/mummy_returns_scorpion_king.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/OtXhjRM/4373124341.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/gvhijag/first_strike_t15_dmr_review.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/2ESVggJ/63434280696.pdfIn PDF document text
    • https://podozipejubepa.weebly.com/uploads/1/3/4/8/134893890/cc857e7.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/xubipizaketowir.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/ZheqKu6/veguzib.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/83342657945twurm.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/hDgfgcd/toca_pet_doctor_apk.pdfIn PDF document text
    • http://2220202.ru/mardaani_full_movie_watch_online_hotcv2u0.pdfIn PDF document text
    • https://tesurupijirixu.weebly.com/uploads/1/3/0/8/130813669/116150.pdfIn PDF document text
    • https://darefosal.weebly.com/uploads/1/3/4/6/134601331/zesexutavojusekel.pdfIn PDF document text
    • https://jajixawu.weebly.com/uploads/1/3/5/9/135992574/8119725.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://jijetebum.epizy.com/zepepigodapagibogixel.pdfIn PDF document text
    • http://veveliwuw.rf.gd/finding_percent_common_core_sheets.pdfIn PDF document text
    • http://devisufuxuvit.epizy.com/european_guidelines_quality_assurance_mammography_screening.pdfIn PDF document text
    • http://xitunixanamo.epizy.com/55661092118.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD880 5028 bytes
SHA-256: f470ceef0f5914aef4db056adcdca4ead5b27822ef829236b932d7793f7cb536
font_01_sfnt_off0000e982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 10100 bytes
SHA-256: 09fbc93d3582a84612c7bfdb9fd3b4c1044585fa9dcc602c73708a4d021431b0
font_02_sfnt_off00010bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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