Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce440eda5e1b650…

MALICIOUS

PDF

71.7 KB Created: 2021-01-10 16:07:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9786dbdb52d73fc8e7e5a7595ffa31d4 SHA-1: 7f3fe010ceff294631fe31cb8e6c670af24e3f18 SHA-256: 1ce440eda5e1b6508cbadfeae60340ec8de67534f209267ae31093137ab4be5a
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic firings indicate the document is designed to link to a large number of external PDFs, likely as part of a link farm or to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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://traffmen.ru/123?utm_term=what+is+a+fiscal+policy+tool In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_5fa1da42a6585.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/cjguu2G/marvel_spiderman_venom_hologram_card.pdfIn PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/3ff0795aaa7cf7.pdfIn PDF document text
    • https://mivoxoxez.weebly.com/uploads/1/3/4/3/134340481/a5c1e1fba28d6.pdfIn PDF document text
    • https://vexakoloninabi.weebly.com/uploads/1/3/4/8/134851928/zegikiwoju.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/7578434.pdfIn PDF document text
    • https://zuduberojep.weebly.com/uploads/1/3/1/3/131398404/1343369.pdfIn PDF document text
    • https://verulezame.weebly.com/uploads/1/3/0/8/130814285/faziwowosinopi-sadoli-nevuxedonure.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/jolozidabi/apollo_touching_lives_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/acr_guidelines_gadolinium_gfr.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/wefowomel.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/21772403959.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/fitbit_watch_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/jomenadip.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_off0000de29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE29 5124 bytes
SHA-256: 9cd3cac7006ee769e9e29f7a4a4adb2af902bb6e528c218d95b56155b9a9d0bc
font_01_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 9936 bytes
SHA-256: 7609e0ca3333ebf7298fe4efc4c3d9f921a5f499479bcdfcfc6e8df43beb3a40

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