Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f40c6b1aafefcf…

MALICIOUS

PDF

76.6 KB Created: 2020-12-06 22:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0eb423b9d98c1456d9d4e5bb4905657c SHA-1: 20437c40b12e1086dcc74cf0b165ba53f8fe9ff5 SHA-256: 96f40c6b1aafefcfe64ac430b3529dac6e87006fffd9f06e417b1d17ab4db9e3
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=crazy+flasher+4+hacked+arcade+games PDF link annotation
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/826b873ef97b.pdfIn PDF document text
    • https://lodofimedama.weebly.com/uploads/1/3/4/3/134327961/vakilagen-mevoroxulem-nebivuwini-jagonopigugi.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/a4596f602e76583.pdfIn PDF document text
    • https://puzagetidorijes.weebly.com/uploads/1/3/4/4/134495880/tolikabawikod-tegud-bopotagolakopam-sekuxevigapew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_5faf65f55795e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/957da60b-cf2a-4d46-84ff-82955451f02c/tupagazidufuvurawegi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe09b79d7936484055a482/1606289850113/voyage_of_the_dawn_treader_book_quiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28b4ea13a450babfe95ac/t/5fc430b09ee0f32b87d8693f/1606693043467/one_big_party_icivics_answer_key_vocabulary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f5160bb-f768-45ba-93f0-df8ffe14273b/ab_soul_dwtw_download_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef39c22c-1920-48da-bbc7-a04101daf997/91841972346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169c9f16-6694-48f2-9d97-74c868af9b38/gwen_10_hentai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdbbdf0-17a1-4747-aa25-fb4b086eec2b/quotes_from_twilight.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1e09fbdb33045eec91c30/t/5fc5509f08845d09243a741c/1606766752920/method_of_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d862bc60-cfaf-48f8-b1c0-90490fc1f5a7/x22_super_pocket_bike_125cc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfed41a-3d41-42c3-ab40-8f4932968558/abbyy_flexicapture.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD557 5644 bytes
SHA-256: f6c31be2dd87c5800e6325d0948a6b15af239a4aeee6e3ba4b761b06c404a767
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 10788 bytes
SHA-256: 911546052035e529eee6bd71ccef214850e1d9303db52c88387c818e9e549c35
font_02_sfnt_off00010db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB2 16232 bytes
SHA-256: e1fcaa290bc8b5aed85f312864440120c61db6abd2add9737883d56687aaee62

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