Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c1ebb234101e3d…

MALICIOUS

PDF

81.1 KB Created: 2021-03-17 10:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d972da7dd846647c5c96d9a91f12d560 SHA-1: 80b7d7dcc39fb9ffb5a6915d8f6d83283395dc3f SHA-256: d3c1ebb234101e3d68e63939440e898e1b80ffb6454dbbe3f2156e793ee1e7ee
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/strik?utm_term=aircraft+maintenance+engineer+course+in+nepal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373259/normal_5fe3488aafb37.pdfIn PDF document text
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/doviperopit_nasaji_dopimixusetu.pdfIn PDF document text
    • https://sidusofigogo.weebly.com/uploads/1/3/4/8/134860790/5516492.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/ihheogh/cloud_9_store_location.pdfIn PDF document text
    • https://danivuvi.weebly.com/uploads/1/3/1/4/131407625/9074632.pdfIn PDF document text
    • http://neuroncraft.online/how_to_clean_brother_fuser_unit0t0k7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5fe573b570374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fd09b3194680.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/ugehgjN/77554602481.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/fb5aa3b8b38a4.pdfIn PDF document text
    • https://gawupuvuto.weebly.com/uploads/1/3/4/5/134530234/zapegexelive.pdfIn PDF document text
    • http://marketitaly.info/ingersoll_rand_185_air_compressor_parts_near_me21p1h.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/heHarib/vp_racing_fuel_c16_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413370/normal_5fc825cb34db6.pdfIn PDF document text
    • http://all-casino.xyz/disney_world_parade_times_february_2020zolts.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://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_25dc92e385f54f54984523b3b75531ce.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_ae71d33fbc374d48863508985adbf5c8.pdf?index=trueIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_9f563093a6dc4f4cb0eeaef6f8ce058c.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_91f711f0b3274cd9800be52636bf6456.pdf?index=trueIn 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_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 5208 bytes
SHA-256: 3cae1c0b5ff0d2fda4edd7a34cfaeef30e969908abe0394b4a0812b7a1bac661
font_01_sfnt_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 10400 bytes
SHA-256: b4882a0f5643c0794ffe47ea123e28bfbd71991b7f649cea3985fc60f9f39360
font_02_sfnt_off000128f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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