Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4815a4681aae8c…

MALICIOUS

PDF

68.3 KB Created: 2021-04-04 03:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8bde2a0e51f27d0a16c57e291cafc9da SHA-1: bdf4d4b85239f761e3949f203b1650674ac1b2cc SHA-256: 3e4815a4681aae8c58d23ad465b2b4651410fa355a81445751af2c7500a0cc6f
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 0.9992

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://mezovuduw.ru/wix?keyword=blank+clocks+worksheet+twinkl PDF link annotation
    • https://cdn.sqhk.co/gujadozede/jicbhgR/thoroughly_modern_millie_characters.pdfIn PDF document text
    • https://mibivatoroxup.weebly.com/uploads/1/3/4/7/134762409/nagizezogakonowumog.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/6idgigi/guncrafter_industries_1911_review.pdfIn PDF document text
    • https://bufasijo.weebly.com/uploads/1/3/2/7/132740378/levariwanufen-keginivawoti.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/220501.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/Whj6ogd/super_stickman_golf_3_gravity_lab_ghost_flag.pdfIn PDF document text
    • http://physcoo.com/21282753428ys27u.pdfIn PDF document text
    • https://cdn.sqhk.co/numobelez/qlNjcig/mubawegadufusilebipibeka.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/toginogixujipi.pdfIn PDF document text
    • https://sefelitajirowa.weebly.com/uploads/1/3/0/9/130969992/lokoj.pdfIn PDF document text
    • http://xtreme-sport.ru/68452424341ixiqg.pdfIn PDF document text
    • http://neuroncraft.online/49705951007v3e3n.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/baxunaf/xewinij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f101eb-a0dc-4d49-8f8c-3c9d51edd18f/my_bissell_proheat_is_not_spraying_water.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/17895867058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d25527e-21ef-4b93-a771-6d28f0717f8f/mind_power_book_in_hindi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f95ba4a0-2886-4d43-8cb3-2c7b2e78b56d/golden_sonic_fnas_4.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/gajifomugosuwej.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/panasonic_the_genius_sensor_1250w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df47aed9-006d-498d-abf9-8dcbee41b20f/nimotez.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/sorilo.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/tirafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb189e87-58e1-49b4-950f-02db4b522f37/gimp_vs_photoshop_which_is_better.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/hongkong_land_holdings_limited_annual_report_2017.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_off0000cec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC9 5092 bytes
SHA-256: 53ffcab7e70a418e58083f9770fad2ebedd8a349a25094d799197192a6222d41
font_01_sfnt_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 10412 bytes
SHA-256: f8bdda5756d8ca92d9a9bb8b5530375fbd8ff0907990dc58d89a5ffd8856c1ad

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