Malicious PDF — malware analysis report

Static analysis result for SHA-256 414f992287b452ba…

MALICIOUS

PDF

79.6 KB Created: 2021-02-14 23:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a9ad9dd92557b64dafa78c7de656d9c6 SHA-1: 3c601a1c9196b84e13fda20ca90542af6cd4c3b1 SHA-256: 414f992287b452ba6f84d41cd5999d5b31791339c4a9c08cec2280b5c8545b68
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, suggesting an SEO link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/wb?keyword=excel%20bedingte%20formatierung%20%C3%BCbersetzung%20englisch PDF link annotation
    • https://cdn.sqhk.co/muwazubivotu/YhXiaYc/lumbar_stenosis_icd_10_right.pdfIn PDF document text
    • https://nobakavukip.weebly.com/uploads/1/3/4/3/134373074/kolaxak-regukep.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/gfgfZOF/halloween_party_invitations_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/hjgfihS/sexife.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/dinisewuzilawedola.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/haWjhNf/95769721375.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/PPa6hhf/watch_dd_sports_tv_live_streaming_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/7KHYlhQ/lifeafter_recipes_coconut.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/hgXCVig/ultimate_bird_simulator_game_free_download.pdfIn PDF document text
    • http://godisibipuvam.22web.org/abilify_injection_prescribing_information.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/sefipa/asr_1000_ipsec_configuration_guide.pdfIn PDF document text
    • http://wokebusaxefani.epizy.com/67622854448.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/57258692735.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/daffynition_decoder_answer_key_dog_sled.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/37715497771.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_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 5772 bytes
SHA-256: f725aa15cf306c02e5fb1b08a9f868f5b69c331743a2c63eb040dc56e1b78427
font_01_sfnt_off000105ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EF 12304 bytes
SHA-256: a0266e63e1bf9ee48bd111bbf963e8a037d06e6f49e52900de8da876c5030a5e

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