Malicious PDF — malware analysis report

Static analysis result for SHA-256 c401458b56490e9b…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 19:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f683e8672861ed146b472ae7acad60ea SHA-1: d9105ae565142073ef03ffa60ae44f287ae5ee55 SHA-256: c401458b56490e9b12cb829c5bb4aa64833960dc7819d20c03bbff73b64fa684
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://botokaw.ru/123?utm_term=define+roles+and+responsibilities+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409239/normal_600e8b0a2c64f.pdfIn PDF document text
    • https://lusovajilabijix.weebly.com/uploads/1/3/5/3/135351537/3350882.pdfIn PDF document text
    • http://kefoweloruzopos.22web.org/fewojagobujeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465398/normal_60318862a989f.pdfIn PDF document text
    • https://fafiwopadatomag.weebly.com/uploads/1/3/5/3/135326984/c953a1b5470b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408471/normal_603a5d7ee1452.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/5e4110dcf.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/ad9566c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavawefojob.epizy.com/how_to_open_a_dsc_impassa_panel.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_5c761ff90cd94b83b3c741d3116f8188.pdf?index=trueIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_a2d6719b7a114415a8b1e2a3a9b02f82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/unlimited_power_beat_saber_hard.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/how_to_install_genie_wireless_keypad.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/69104832001.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_50e1fdf172134502be26e66058ba1002.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/bluestacks_3_install_apk.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_3f8cc61dabd147f1bc5e4bada0c8b137.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/16500968738.pdfIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_4a585576ad3e4d7b830f2d1fbd6a1570.pdf?index=trueIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_fe95968726d74826b1292ac8eb066a79.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001035f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035F 5324 bytes
SHA-256: c66952183f26b242c0c1459f74f2a26dcb3ff8beeadc25508ca113f00dcf5dfb
font_01_sfnt_off00011563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11563 10724 bytes
SHA-256: e01ec22790c048ee7dfcd2ff33d8ae85336ed91281eeffd737bf125b8fbe3975

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