Malicious PDF — malware analysis report

Static analysis result for SHA-256 d137a25d7d324a07…

MALICIOUS

PDF

76.4 KB Created: 2021-03-27 22:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ccb54baa525e47407b9f5518b3a371dc SHA-1: 9df6a18f2bf32fc6dc4ba98e032e3177372859f0 SHA-256: d137a25d7d324a07a8c8caf87ec2e94076276d1f53ca6eafc56dca7cae5d6c4d
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-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://jumiwimov.ru/award?keyword=international+franchise+contract+pdf PDF link annotation
    • https://cdn.sqhk.co/duzupafuj/l2jdrUp/gozujuwitadivoxusata.pdfIn PDF document text
    • http://fasadi.site/zazorejadawetunupenexix83ce.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/ggERgcg/79293912695.pdfIn PDF document text
    • http://itrom.fun/xafixoxatisugezudewioty3.pdfIn PDF document text
    • http://moviesaddaa.online/water_parks_in_paris_franceh2c4w.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/gegj4hf/15512354767.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/uigFQii/dapigobemurofex.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/Cgeifgc/dokdo_game_cheats.pdfIn PDF document text
    • http://dietnatur.fun/45038625397rbiuu.pdfIn PDF document text
    • http://raisinsapp.pro/12_inch_kicker_comp_c12_specspuz71.pdfIn PDF document text
    • http://english-10.site/78147743061pfsml.pdfIn PDF document text
    • http://daddytestit.xyz/19956384148y5a66.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/what_is_the_best_craftsman_riding_mowerei6bm.pdfIn PDF document text
    • http://magnifioco.site/22575161370iwkoh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_e5ffbb2982d5418abcb9031e7490ce6e.pdf?index=trueIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_e1ed825e9ce44afaba904c2efae6fcb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/wagtail_free_templates.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_ef3546c4b6954cdcb437ab3a83c82642.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/ip_subnet_calculator_portable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/44231983195.pdfIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_d3186880eb6c47849414d6470d19c9cc.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_9e3449164e344639b5f1d729bf35f212.pdf?index=trueIn 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_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 5180 bytes
SHA-256: 1a00ad98a498ccffec60a2085b150afd39a68b0314ed5438362aded987da1660
font_01_sfnt_off00010066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 10084 bytes
SHA-256: b03299b5659a9d81120f8318056829484d7fb78c84992263de1bd8d2957f8e78

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