Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b62ed8a3bf780ab…

MALICIOUS

PDF

74.2 KB Created: 2021-03-27 12:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a7d5ab322d4bd79d80d32dc0ce28666d SHA-1: 51a2361bc2df71026c5050d91893feb15c1adf1a SHA-256: 9b62ed8a3bf780abd20d8bb60be8f51d63d2adcfdf2d877dad326d1f76165c49
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://xajibur.ru/award?keyword=nsw+math+syllabus+pdf PDF link annotation
    • https://cdn.sqhk.co/pevukoza/cxXpggp/houseparty_fortnite_wrap.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/ibjjAhd/31687603165.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/jbgjica/euro_train_simulator_2017_mod_apk_download.pdfIn PDF document text
    • https://mozalotajevel.weebly.com/uploads/1/3/2/6/132682758/8abbe.pdfIn PDF document text
    • http://bosuxezaxad.mypressonline.com/59647851350.pdfIn PDF document text
    • http://keniworu.mywebcommunity.org/jekelopipujutule.pdfIn PDF document text
    • https://kowenijog.weebly.com/uploads/1/3/4/0/134096242/1138206.pdfIn PDF document text
    • https://lojanoper.weebly.com/uploads/1/3/5/4/135400197/46571.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/warhammer_40k_deathwatch_codex_8th.pdfIn PDF document text
    • https://cdn.sqhk.co/tapowifilez/agcajdm/plant_city_warehouse_jobs.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/9718409.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/e3ihPjb/cherry_tomatoes_planting_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/heLiahf/41048011148.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/how_to_change_time_on_panasonic_kx-t7731.pdfIn PDF document text
    • https://rezibufebaxiban.weebly.com/uploads/1/3/2/6/132695258/goviwax.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/jeicnEI/22229271190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97eb045c-5c72-4ada-8bd5-7724e4bdf352/xetakoposozugulamiwubutit.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/what_are_ethical_issues_in_psychological_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6fff878-5350-471d-97b9-f2d50c430e16/44899026544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71f8038-d314-4bb1-a752-13c0e9c5852b/84750443947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147c4e12-90f0-47db-8595-cd0a977bad39/81084009846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1b4057-a088-403b-8f49-8ac44a68be62/76181685336.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_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 5488 bytes
SHA-256: 3f87f5bb49e7e0689674fc09038e52f55578e0bb449dd8b04a4750cff17c15a7
font_01_sfnt_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 10344 bytes
SHA-256: b988dbe10b03cca652128d517ca7efb00cadc6441eb59347bf2ff19f8f9bfcc7

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