Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9ed105d027a285…

MALICIOUS

PDF

75.9 KB Created: 2021-03-24 11:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1648664de8627c9fbf11fa1b7af28786 SHA-1: dfda0602c2f9306ebc732f642bf59af09e2ab9e9 SHA-256: 9c9ed105d027a285708428c2d190bbe153bd6ebe60ac2b62efc78e1425892d6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The presence of a large number of external PDF links, many hosted on Weebly, suggests a link farm designed to distribute further malicious content or redirect users to phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=villa+of+mysteries+bacchus
    • https://lonegaru.weebly.com/uploads/1/3/0/9/130969637/fa66f3f3256c6f0.pdf
    • https://zofodepeva.weebly.com/uploads/1/3/5/3/135318354/fa4b9df51.pdf
    • https://jezafemobad.weebly.com/uploads/1/3/1/3/131383748/32a122aed.pdf
    • https://cdn.sqhk.co/jarixizotib/shajeib/muwinuwapozogovoxazuva.pdf
    • https://xaxaguxoludu.weebly.com/uploads/1/3/4/5/134519627/kokerawelujuxemo.pdf
    • https://cdn.sqhk.co/fuvebopeweb/R53jbgf/carx_drift_racing_online_gameplay.pdf
    • http://koprovk.xyz/bumoxululeluvijoweb92qkf.pdf
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/ributukudumoz_pilivojiveju_rofetup_fawif.pdf
    • https://selemuja.weebly.com/uploads/1/3/4/8/134893326/gulologogid_meruba.pdf
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/funifiludatexalid.pdf
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/mogutopalipuzo.pdf
    • http://tosiwegijulu.iblogger.org/colonoscopy_guidelines_singapore.pdf
    • https://gilanevevo.weebly.com/uploads/1/3/0/7/130739192/nitejikopusarej.pdf
    • https://pemowazazafal.weebly.com/uploads/1/3/5/3/135385959/sonama.pdf
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/8746519.pdf
    • https://cdn.sqhk.co/govizanorev/wiakhYs/fruit_ninja_game_online_free_download.pdf
    • https://cdn.sqhk.co/zapiseniw/Gibkidi/pet_paradise_resort_sharpsburg_ga.pdf
    • https://cdn.sqhk.co/letarezetap/jjgcjiX/bluestacks_hd_app_player.pdf
    • http://front-glass.space/lang_leav_books_download_epubhiah5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vewabepugu.epizy.com/pomikotururifero.pdf
    • http://fekobovovexi.epizy.com/33404829063.pdf
    • http://wudujijejek.rf.gd/65272387869.pdf
    • http://jirarawoxi.rf.gd/39538130997.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead8.bin
aa225401a3cb1c9685661a1c03e1709d77f76fc24ce6e2578465c0e40443dced		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD8 5328 bytes
font_01_sfnt_off0000fcdb.bin
f02343ad7a55e49f744b06e4e5302bbdb8d5d2b63c96f4290200b9afb49f5de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 10472 bytes

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