Malicious PDF — malware analysis report

Static analysis result for SHA-256 da66713920a18343…

MALICIOUS

PDF

70.8 KB Created: 2021-04-05 16:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9de6d38bb6783bcfa881247178a1ea24 SHA-1: b70c0998242f67f76768219b4b8896fd28ff5829 SHA-256: da66713920a18343f62cf0c3a19a25f0654b96d79e53c8a11639570d29d3f22b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/123?utm_term=des+plaines+illinois+hourly+weather+report PDF link annotation
    • https://pofunowiri.weebly.com/uploads/1/3/3/9/133997400/3da7681.pdfIn PDF document text
    • http://raffle.website/doxuvupuvojivutilikehkh1r.pdfIn PDF document text
    • http://sodahq.club/66726921662trnhk.pdfIn PDF document text
    • https://bumibaniligaza.weebly.com/uploads/1/3/1/3/131383581/82212a75be0f4c8.pdfIn PDF document text
    • https://tenosufude.weebly.com/uploads/1/3/1/4/131455069/d8002.pdfIn PDF document text
    • https://pelirexasi.weebly.com/uploads/1/3/4/3/134352860/voluka-tujusup.pdfIn PDF document text
    • http://bio-ita.fun/feparopwztqj.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/047741dd9e57d9.pdfIn PDF document text
    • http://lotto-investclub.com/asphalt_7_java_game_frees0vro.pdfIn PDF document text
    • https://gafogipew.weebly.com/uploads/1/3/4/4/134475428/7601f9c08843166.pdfIn PDF document text
    • https://rexirarilabe.weebly.com/uploads/1/3/2/6/132681411/jesitepugi-tejafagikilis-kusalowakozab-rimuvu.pdfIn PDF document text
    • https://gojafone.weebly.com/uploads/1/3/4/8/134891791/lijikixasilidob.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/wipotegadodorek/xesilisixexesafuvapej.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/woe_is_me_saying.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/kotorelerovow.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/kadamban_full_movie_tamil_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/factual_report_text_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/how_to_activate_iphone_4s_without_itunes.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_off0000d7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C0 5100 bytes
SHA-256: 5ffb7df0306fd184afe32e680ff80baba3230744c87b4de153424e10468a4d00
font_01_sfnt_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 10844 bytes
SHA-256: 7d58c87e93ecca405274a8b9f4eaed001795784be06cc7e7779a82ba03adac71

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