Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc89e9cbec7742b…

MALICIOUS

PDF

27.0 KB Created: 2020-06-13 21:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea739afe96a6058c2f823745a8aec031 SHA-1: d135d2fa512b1e5da5a6567bcecceb2bc35f48c7 SHA-256: 1bc89e9cbec7742b56ec6b9a81dd8e34ff5ab2cdf90f1f29c42dca7cbe9287f4
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF is identified as a malicious phishing lure due to its structure, containing minimal text and a single image, typical of a screenshot designed to trick users into clicking a link. The embedded URLs, such as http://gingermelon.ca/uploads/1/3/1/4/131452942/131452942.html#plan+de+circuit+de+train+%25C3%25A9lectrique, likely lead to further malicious content or phishing pages. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting the phishing and potential SEO abuse vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 27 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://gingermelon.ca/uploads/1/3/1/4/131452942/131452942.html#plan+de+circuit+de+train+%25C3%25A9lectrique
    • http://mail.kalvscamping.se/uploads/1/3/1/4/131406608/5436717.pdf
    • http://straightuppartyrentals.com/uploads/1/3/1/4/131437194/tupaferizepuladewug.pdf
    • http://grahamandlane.ca/uploads/1/3/0/5/130545493/9265605.pdf
    • http://mta-sts.mail.lassenfarms.com/uploads/1/3/1/4/131407807/1590697.pdf
    • http://philliprodriguez.net/uploads/1/3/1/4/131437359/5933ddbf2.pdf
    • http://bnbgurus.com/uploads/1/3/0/9/130969838/rexewojeware_vuwukuba.pdf
    • http://vmbconsultant.net/uploads/1/3/1/4/131437812/3807867.pdf
    • http://innovacionpublicitariamagenta.com/uploads/1/3/1/4/131438362/xinaxa.pdf
    • http://webmail.earlsnursery.com/uploads/1/3/0/2/130271159/8744365.pdf
    • http://74-123-77-53.mgwnet.com/uploads/1/3/0/5/130551764/7531458.pdf
    • https://modunopowo.files.wordpress.com/2020/06/79279773645.pdf
    • https://fonumaputew.files.wordpress.com/2020/06/niberamipejifefizelukivu.pdf
    • https://mofebim.files.wordpress.com/2020/06/22164977482.pdf
    • https://vobenixabew.files.wordpress.com/2020/06/81379039567.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000444c.bin
25e26dee4cc36f3a2f40de1cb79e121e12525364a2f197f6a2e65074e819df23
pdf-font-stream PDF embedded font (sfnt) at offset 0x444C 7828 bytes