Malicious PDF — malware analysis report

Static analysis result for SHA-256 8436cc326f924cd6…

MALICIOUS

PDF

75.1 KB Created: 2021-02-14 04:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 53143c0336d5d4b7697d289cf985015b SHA-1: 5755075c7842a2649ab036a535ff2e821f3e46de SHA-256: 8436cc326f924cd60892d9447aab7ce944d03d9609fb3a5e2a9463d665eade5a
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector URL, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. The embedded URL likely serves as a lure to a phishing site or a download server.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=cheapest+carton+of+cigarettes+at+walmart In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_60107eb1b12e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_600fc352acf8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5fcd31ff7191e.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/4rxhCkg/96425314531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_60220e044bb68.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/uQLghzF/mafififenoresojovafoda.pdfIn PDF document text
    • https://cdn.sqhk.co/feneradebeza/gfjfhdy/50856891123.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ijdPjaY/doodle_jump_game_240x320.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/jiiaGz8/steam_gift_card_codes.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/dazovosugev/clerks_award_pay_guide_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/rixugefuvigugogodeni.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/narorale.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/difive.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/lifanenusatokaviw.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/gujejaxurata.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/59765404084.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/simatuk.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_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 5428 bytes
SHA-256: 387642bd5d4749d11b042a1ebfd088280617cc9976b0df82c0abff173af9022d
font_01_sfnt_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 14156 bytes
SHA-256: 63d97acf99213cf5b1f61bcb2d86b5a40dc8897af7a8d26c6df15396303706e5

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