Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd33244e1d22f8d4…

MALICIOUS

PDF

123.6 KB Created: 2020-12-16 22:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f49de63ef6855f55d3e78ce791885352 SHA-1: ed972fafae3feb25dba3c04feab5db51114b39a7 SHA-256: dd33244e1d22f8d446177c99965b043968549e4ed227bcb0c8e6190ceba874c7
214 Risk Score

Malware Insights

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

This PDF document has been flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document also contains a large number of embedded links to external PDF files, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/123?utm_term=understanding+the+question+and+pre-bucketing+answers+treaty+of+versailles In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.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/faxaxos/yiruma_love_me_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/87092684894.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/phim_hay_han_quoc_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b9d1c43b171198859c62/t/5fd227807cf94534dc64c0a3/1607608193274/talking_panda_bear_toy.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/slate_digital_trigger_drum_replacer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/limesurvey_template_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819d314f-ee7f-461d-b147-c4ce08b5491c/modern_welding_11th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/solo_arenoso_e_argiloso.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/print_form_for_australian_passport_renewal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4362bd48-41a5-4b75-8fd4-f111ef0ba499/94363773429.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/nefaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/wapafibosamukidapenumut.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_off0001a476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A476 6024 bytes
SHA-256: ef58721a1d4e18b41bb78f040a6250c7bd309fab26e34b8746213e1487d9c455
font_01_sfnt_off0001b90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B90E 11580 bytes
SHA-256: d62300e97df6f6ae67fe832bae87bac0dff3f2ff7909c8dba02c33ba4501157c

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