Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74ea66a83fc70c7…

MALICIOUS

PDF

192.1 KB Created: 2021-03-14 19:26:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c81b5ec83cdf5ffe81bff030b9e745b2 SHA-1: 6a78c6bd9619322b1197773e77eed36ce4cfafa9 SHA-256: e74ea66a83fc70c71ad2a4c0c87366dbbffeb844768c30ade81bfde1ec45115b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting or potentially malicious domains, suggesting a phishing or malware distribution scheme. The 'SE_LOLBIN_RUN_COMMAND' heuristic firing further supports the idea that the document is designed to execute commands or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://golowaki.ru/award?keyword=zohar+kabbalah+pdf+espa%25C3%25B1ol PDF link annotation
    • http://kamikofonem.mygamesonline.org/25670024340.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/ficgiH2/2580434117.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/Rhjgfjh/71831645882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_60497c9374626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418778/normal_5ff436d05d689.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/93019922831.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/windows_cmd_list_files_with_extension.pdfIn PDF document text
    • https://cdn.sqhk.co/manoxixo/ozabgiP/16488523594.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/gebitasixa/gdrEhhD/train_taxi_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/ix3Fie6/56693500515.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/ij2jgjj/10341766619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494888/normal_601b9044863e1.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/hd4guKQ/ice_cream_maker_cuisinart_directions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5fe70d4504308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375704/normal_5fe283c65ad4e.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/udCqibe/5150820598.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/xunilukegez/78953726211.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/bapusawawedewufob.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/4774101670.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/32715330041.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/xijilesuzuxo/what_does_a_godchild_mean.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/pijetawanaxuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/cisco_ccna_200-301_practice_test.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
    • https://s3.amazonaws.com/sIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002acb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACB5 5500 bytes
SHA-256: b3b2a3e94cabcb8d953c749d5a85543520f153c03d37ddcd4b67dae2d43472bf
font_01_sfnt_off0002bf22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF22 14684 bytes
SHA-256: b49074e9cafd8f04e7f3b931ab7f977ff55ffed6333f2ca1da3f8906314eb934