Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c734215ee250fad…

MALICIOUS

PDF

79.4 KB Created: 2021-03-25 06:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d28d936c72300e786d74ddf58f8fe968 SHA-1: f8b088c710cbf016a5c57347d2c2f223be78c2a5 SHA-256: 0c734215ee250fadd56b46e62cc5906ff10496be15e271f37edd3882d0b8dfad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://soxebez.ru/123?utm_term=equipment+lease+purchase+agreement+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5fddfedf9550f.pdfIn PDF document text
    • http://dutuvowori.22web.org/76623525834.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/botany_practical_book_part_1.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/57295037624.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/bixogavufanane_panaged_xatutotepinupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_604d909f7b100.pdfIn PDF document text
    • https://legukofa.weebly.com/uploads/1/3/5/3/135318177/7140733.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/pulujolatepuv/83678887673.pdfIn PDF document text
    • http://xejarejunap.rf.gd/tidiwarijanezifedibudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fa1585-236e-4a6e-a42b-af91056f22d4/bonugup.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/40953874549.pdfIn PDF document text
    • http://mukuraxoviniron.rf.gd/what_does_the_sun_rising_emoji_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/adhd_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/25410478466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c90f6c-18a4-480b-9462-eb9a0408462b/troy_bilt_pony_drive_belt_length.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/38907550814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d00a78b6-aff8-4cb3-877f-6fa068e13437/9322335353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298b11a3-8bfa-4d59-8a7e-1958336f73e1/explicar_el_concepto_de_tabla_peridica_de_los_elementos.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_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 5204 bytes
SHA-256: dcba5a5c0cf58a9812e7c31580b0983d16a9acd79ce0f30c5117075377dc73a8
font_01_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 11160 bytes
SHA-256: 113d8c045eb3536463e0e3f3533299ad3368f9df772c868a55a17b7b7298a900
font_02_sfnt_off000121db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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