Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd45a03110584be7…

MALICIOUS

PDF

74.5 KB Created: 2020-12-29 23:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c5d4ac258a821dca44d4d0ae734c70e1 SHA-1: 1dd5819ba7d14c7b8403f94d1dac105a992dd394 SHA-256: dd45a03110584be792d80d132fbbf5a7dc21f295204a81ac7f5db0722bc3b65d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded links, with at least one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external, potentially harmful, content.

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://gettraff.ru/strik?utm_term=tiny+rifles+famobi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f98dcd8ebe7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5f99f137a5fd0.pdfIn PDF document text
    • https://dudumudisedaj.weebly.com/uploads/1/3/4/5/134591614/kofiv_navogux_zilegavuliremib_lurikexodig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f905c1f787dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f87401aee3d2.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/7BlNgiF/download_game_dev_tycoon_mod_money.pdfIn PDF document text
    • https://roderisagewap.weebly.com/uploads/1/3/4/5/134507489/90f9461fbbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5f97aac7340f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fc6aa016f868.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/jtkhigd/rafesekurerovajofenozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_5fdac1d90697b.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/vojapu/68459519062.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/human_anatomy_and_physiology_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/37955567984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c153f06d-3e45-4b38-9120-e7a4ab25f09c/xosimoxatefepunavu.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/alhambra_granada_guided_tours_from_malaga.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000fd78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFD78 19104 bytes
SHA-256: 5b665d995e0848590176bacbe122e0ebdae04ab8c25d504259453028a9160267
font_00_sfnt_off0000c8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FE 5104 bytes
SHA-256: 2839b4678b6ee0c17db11fa41665db5d80eddb8c850996bf8803b8295a691298
font_01_sfnt_off0000da4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 10220 bytes
SHA-256: 903b6ce46aac7195080b801f5d1b7cab31af4c804e759a26d84f6d5036c550c0

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