Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d8acab89167f36…

MALICIOUS

PDF

74.3 KB Created: 2020-12-22 02:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6c00b6fe8870c13a9b630a29c885a90b SHA-1: debe293dc80af87df54e0778c80d04ea657ff3ef SHA-256: 46d8acab89167f36e78b1181d3b00e6c1a16a4624d344d96cd734245e15dc5a2
214 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link-farming or redirection scheme. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing or redirection lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=adorable+gacha+life+edits+cute+girl In PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/xukezo.pdfIn PDF document text
    • https://zavurebugefogoj.weebly.com/uploads/1/3/4/3/134397626/6342029.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/ximoxuwizajojexedom.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
    • https://s3.amazonaws.com/xunilukegez/45177583068.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/fanfare_for_rocky_trumpet_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5223279-a418-48fb-b70f-295d0253795e/breeding_calculator_monster_legends.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/calibre_convertir_formato_kindle.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc598d9c89e1c4b8fde8ecc/t/5fd674bdab7772717691ccf2/1607890110246/dakisojibisosagokejaki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c36ae5c7695ca9b45588/t/5fc52134fa04221c71c40540/1606754615066/94838680951.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc174e7bf71053ccb141a2b/t/5fd203b98ba64b78df5adfd9/1607599034509/best_sci_fi_romance_books_for_young_adults.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6715adf132613bbe3892d/t/5fc83b548bd779356749ba14/1606957909585/dead_cells_switch_update_rise_of_the_giant.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 5188 bytes
SHA-256: 82ef7c622c54aea31e60f0877721bed53ae1a151776ccd9faca1b7b162ba5493
font_01_sfnt_off0000eaf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 10360 bytes
SHA-256: 9c71dad3434ad916d4f7c29517cacbd051206094d88276c42e806a1b412d6cc3
font_02_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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