Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5c44d0af6e3f94…

MALICIOUS

PDF

71.7 KB Created: 2021-02-24 10:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fb19ee98e0caf4f5556e77f442f2938e SHA-1: b23dafdd946f917d2f0603294b692e7f789da9de SHA-256: cd5c44d0af6e3f940026dfdcb388fd0722ad9a2323fae63141a4f965b2df0ab8
176 Risk Score

Malware Insights

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

The PDF contains a lure related to D-Link device setup, which is a common tactic for phishing or malware distribution. The high-risk heuristic 'SE_PAYMENT_REDIRECT_LURE' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The embedded URL points to a suspicious domain, likely serving as the initial redirection point for a phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://maypoin.ru/strik?utm_term=d-link+dcs-930l+mac+setup PDF link annotation
    • https://cdn.sqhk.co/feduvefas/88chjgg/build_n_chill_pocket_building_puzzle_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/gjuibWq/nebulous_io_mod_apk_plasma.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/gYiiLhh/xovar.pdfIn PDF document text
    • http://tubujek.iblogger.org/jevikotuvaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/vcihhb6/sdge_business_customer_service_phone_number.pdfIn PDF document text
    • http://lg-supportteam.com/41850621297so7ad.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/ggghjai/car_loan_preclosure_calculator_sbi.pdfIn PDF document text
    • http://vukabakoxipus.22web.org/wolasopugokok.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/t2KF5id/yellow_pages_phone_numbers_uk.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/pafiganovavi/76662585105.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/canvas_business_model_slide_template.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/87097933685.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/lujexegamevebu.pdfIn PDF document text
    • http://ginozegi.epizy.com/finurebi.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/pu_lahore_admission_form.pdfIn PDF document text
    • http://reledolikivep.epizy.com/mares_puck_pro_computer_interface.pdfIn PDF document text
    • http://fabawuluguwoke.epizy.com/fufulinoriluv.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/samsung_galaxy_note_4_case_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/avast_antivirus_premium_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/casal_raiz_xand_avio.pdfIn PDF document text
    • https://d2okd4tdjucp2n.cloudfront.net/misc/mydlinkplugin.zipIn 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_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 5680 bytes
SHA-256: e600b667f3bbab8d53b82d8933a215d66ebca727b700d9d4127aa6b0a1f28a06
font_01_sfnt_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 11044 bytes
SHA-256: a967f6148bc3fa81256f511c710bcdf38189541567bd80166ecb2beadb709dd6

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