Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b09afa3f6b25d64…

MALICIOUS

PDF

83.9 KB Created: 2021-03-14 03:13:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7201c21e1278c8742ad1024dee86aa58 SHA-1: b3c1fa5973b6907ff88c36207a4e4bf81544d7fd SHA-256: 7b09afa3f6b25d64897560048d40eeef3668cfc0daf4157a4213023931d91b65
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs and the PDF's structure suggest it is intended to redirect users to phishing or malware distribution sites. No scripts were extracted, but the PDF's nature strongly implies a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/123?utm_term=courage+book+by+osho+pdf PDF link annotation
    • http://all-system7.work/b_l_c_full_formkyppc.pdfIn PDF document text
    • http://visiblawty.com/dogegitduak9.pdfIn PDF document text
    • http://reabook.online/pusonanoxularurex90xx.pdfIn PDF document text
    • https://cdn.sqhk.co/gidowoji/dpibOKq/zekikefopenubafogibiredow.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/yG1ieil/panic_alarm_system_in_car_price.pdfIn PDF document text
    • http://nakanilo.club/pokimagusuduxuvalunape3dgf3.pdfIn PDF document text
    • http://gisujug.mypressonline.com/simple_python_project_template_github.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/iePywig/umconnect_covid_testing.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/30737233427.pdfIn PDF document text
    • http://streichpack.online/sword_art_online_2_english_dubbedv782w.pdfIn PDF document text
    • http://fsbsiod.com/can_you_get_google_earth_in_real_timeagkyu.pdfIn PDF document text
    • http://drilltech.info/guxaxawifwzzd8.pdfIn PDF document text
    • http://huseyincanx.com/80434948240g3htd.pdfIn PDF document text
    • http://yblda.fun/bubble_shooter_genies_mod_apk_android_141kw3.pdfIn PDF document text
    • http://silver35.ru/the_left_hand_of_darkness_analysisyb7mg.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/82446719897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_15b882307ca5467ab64075dfcbd89620.pdf?index=trueIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_9db6a5fcfc614a16965bec41a265d664.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_b4a464fbf9624e438e30c0c12ec1469d.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_ead3e0058e454f39a88ec57eed9f2c65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/god_of_war_alfheim_100_guide.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_fd28cfcb9ab745a18373ccb3816759d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/zexalo.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_off00010af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF0 5484 bytes
SHA-256: 583612618ff991d481d07b3f7228e54397f78e0aaacae52f7f88a9933de249fd
font_01_sfnt_off00011d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D95 10404 bytes
SHA-256: 3507ecd42796a4cc756442c1a5b039d679977413a49ce10f953ce91399e70c5f

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