Malicious PDF — malware analysis report

Static analysis result for SHA-256 09883c260583c166…

MALICIOUS

PDF

74.9 KB Created: 2021-06-10 08:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b03826a626a2804f50f87f4a4e1bd6c8 SHA-1: 4924a4e89fa168a2b4e7718d70654adce640fba4 SHA-256: 09883c260583c166bf16841c6cf3862c42ad5abec123be49be5baf98fe0c7dd1
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains a URL pointing to a resource promising a game "aimbot apk", indicating a social engineering lure. The presence of embedded URLs and the overall structure suggest an attempt to trick the user into downloading and executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://smidgel.ru/pbw?utm_term=battlelands+royale+aimbot+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366982/normal_600bf01f4d290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387244/normal_5fe338bc8c82a.pdfIn PDF document text
    • https://xawewidijaxiju.weebly.com/uploads/1/3/4/2/134266046/544923.pdfIn PDF document text
    • https://daxuwolazu.weebly.com/uploads/1/3/4/3/134335064/7309b5cb42409.pdfIn PDF document text
    • https://nasoxatexiwek.weebly.com/uploads/1/3/0/7/130739087/6355bebbda9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_602e1ff6dc151.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500444/normal_5fcbd24244886.pdfIn PDF document text
    • https://komolelavox.weebly.com/uploads/1/3/4/5/134518501/1632536572e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_60b7b4f1317c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406812/normal_5fcf806c0c85d.pdfIn PDF document text
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/webibemodezonede.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sovafiben.pbworks.com/f/blueprint_ar15_lower_dimensions.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144699546/3592120566.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/f/36228583931.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/w/file/fetch/144457290/ethernet_cable_color_code_cat_5.pdfIn PDF document text
    • http://fuzugimife.pbworks.com/w/file/fetch/144991785/lobedupa.pdfIn PDF document text
    • http://tereburokofe.pbworks.com/f/3_phase_half_wave_controlled_rectifier_with_resistive_load.pdfIn PDF document text
    • http://gevetijusova.pbworks.com/f/conjuring_2_full_movie_download_in_telugu.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_off0000e7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E7 5460 bytes
SHA-256: 5eaf9cfea994956e298124fa20303373a7e9b1ace11e70b6d38ebc03174629e5
font_01_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 10608 bytes
SHA-256: 0313d0edf0c5f484043c8170e9e5b9763540f84c3c180429d439f68dca235331

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