Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a25a7f7374ccd77…

MALICIOUS

PDF

72.4 KB Created: 2020-12-23 09:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b897978d8328dce927bd9ce1e7b32ed1 SHA-1: 1f1a590db62efc4ef7b5b7c811faff19ac54e1f1 SHA-256: 1a25a7f7374ccd77fae032d3596d69ec416de7b4009b3ba14f927cab0688b67e
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://traffset.ru/strik?utm_term=auction+sniper+blocked+by+ebay PDF link annotation
    • https://gokododilu.weebly.com/uploads/1/3/4/5/134578034/ec72a6fc1d688fb.pdfIn PDF document text
    • https://finejorokisitoj.weebly.com/uploads/1/3/4/4/134495390/xikegedap-tuxinedamot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd11c5a4340c.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/dazinibonofobi/81988467165.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d04840f1034a5cca8d9f/t/5fd080f2fc93c51d16e014bf/1607500018869/spaceflight_simulator_best_rocket_for_mars_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdff62f51e6b539731e3c58/t/5fe0cf169e074e6f3ccb650d/1608568599237/ducktales_moon_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/wisconsin_dmv_mv3001_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/deep_blue_sea_1999_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/99721753076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0af39b-970e-4355-a7b5-eb4f71620236/ziravafitison.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc002d40b6b03258f30bf3d/t/5fc238f5eaf37e3b64e5f0c9/1606564086594/imperative_worksheet_british_council.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/195756df-e8f2-4fd7-9b88-80ea8df67b38/56702884695.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/retail_customer_feedback_form_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b8c4418d7934ac78d68d/t/5fcf4cd776f3eb1a46e09b0c/1607421146035/islands_in_the_stream_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf1502d131352a6a8c9ef9/t/5fd16323b0f0f842d798ccd5/1607557923532/76179055208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5a1b62-5387-4ecb-86a5-fdd013bf5148/78462745310.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_off0000d129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD129 5244 bytes
SHA-256: f78fa10d87ad6b21602d855534f0b1c5f5a8648a50e120b59af198a7962c8750
font_01_sfnt_off0000e300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE300 10440 bytes
SHA-256: a4386a0ac7c4aeb8703c16b4d42974694304410792c6d8fd9856d1c220f14d27
font_02_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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