Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6a8f125f843bd8…

MALICIOUS

PDF

82.7 KB Created: 2021-03-14 11:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ce66f8e82950258b7d4d7505e2d6ea06 SHA-1: 515c092c091ca8b6af07a30974c5415a7ac5062a SHA-256: 4f6a8f125f843bd82ae500921113bb22b94a6128266a348d716b76ad88a70012
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/123?utm_term=free+bible++amplified+version+for+pc PDF link annotation
    • http://merovew.xyz/47548203094cz7oe.pdfIn PDF document text
    • http://pedugubugof.mywebcommunity.org/jack_lalanne_power_juicer_express_mt-1020.pdfIn PDF document text
    • http://study-english-02.space/jokonukarereruxojivasiffsb9s.pdfIn PDF document text
    • http://premial.su/kedodazoladunenipewew0olps.pdfIn PDF document text
    • http://iqecoportal.ru/70259447474cdp4z.pdfIn PDF document text
    • http://sparzha.club/93579958722ru6zu.pdfIn PDF document text
    • http://good-production11.site/61097064736i0i0e.pdfIn PDF document text
    • http://nebolizixake.iblogger.org/pasado_simple_verbos_regulares_en_ingles_ejemplos.pdfIn PDF document text
    • http://nufugexasodud.iblogger.org/beginner_dumbbell_workout_routine.pdfIn PDF document text
    • http://bunnygummy.ru/9670743938krljj.pdfIn PDF document text
    • http://vamolufu.getenjoyment.net/pablo_neruda_100_love_sonnets_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jinonepi.epizy.com/setting_of_thank_you_maam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b06a01-1c6b-4087-8d0d-c906d8f7ed1e/jiroviremezaju.pdfIn PDF document text
    • http://bujekotu.atwebpages.com/childrens_yale_brown_obsessive_compulsive_scale_symptom_checklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2416f6d-ef63-418a-a6b6-b4af8bf92e26/how_to_play_the_bean_game.pdfIn PDF document text
    • http://tipiwozametorol.epizy.com/que_es_un_estilo_de_vida_saludable_brainly.pdfIn PDF document text
    • http://nirapopujikater.rf.gd/26405844790.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18B 5164 bytes
SHA-256: ad2a369efd31a27befc003c43db9d6ab1aad21b8e12f2732457c412d0fd1fbf0
font_01_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 11288 bytes
SHA-256: 125d0bc92b15883c5e8e9644a84737bb819eaad965d50e566ce85fb149f0039b
font_02_sfnt_off0001199f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199F 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off00012e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E66 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c