Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8426b3a2cb298c8…

MALICIOUS

PDF

79.6 KB Created: 2021-09-24 04:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 694cb8c3139c16393208497f5a76407d SHA-1: 91026e0d5e4b6ef903076a5f0e2f6d00cd0382e9 SHA-256: d8426b3a2cb298c8fe3da4bb11346ded60557558fcd4e15750f373b623afd724
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to potentially compromised websites, suggesting an attempt to host or distribute malicious content. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://devitohomesorlando.com/userfiles/files/61232016677.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/4065a70ac9b5f15c9daff17fcfa7407b/54513012611.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/26brcbj6t1jfhupcosogiecmm3/lamekaweferafoxaled.pdf
    • http://dalnoboy.org/data/filestorage/upload/files/87171455464.pdf
    • https://virker-ikke.dk/files/mabenipitinizagutigi.pdf
    • http://dragoniresorts.com/userfiles/87019876451.pdf
    • http://flairpens.ru/uploads/files/12896698805.pdf
    • http://oodow.cn/upload/file/210919230558283683tsmk6mg14ni6.pdf
    • http://mikllc.mn/uploads/files/gunatenugisukigik.pdf
    • http://ks-system.co.uk/ckfinder/userfiles/files/18747621782.pdf
    • http://usateatop.com/_upload/files/78705657896.pdf
    • http://gamaxmotor.cz/data/dokumenty/jiluxuzezox.pdf
    • https://adikkeempat.com/contents/files/79306279820.pdf
    • http://baheth24aqari.com/ckfinder/userfiles/files/fesuloputoponuxuzifebefu.pdf
    • http://gtlmarinefuel.com/userfiles/file/19998835310.pdf
    • http://storemisr.com/uploads/files/tenetuwijesa.pdf
    • http://davidhammerstein.org/ckfinder/userfiles/files/foferopi.pdf
    • http://norilsk.torbay.ru/images/uploads/file/gasedikibuvi.pdf
    • http://wedding-box100.com/uploads/files/202109200452033533.pdf
    • http://www.logomarcanet.com/userfiles/file/bizolugato.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/30331889643.pdf
    • http://nguoigiupviec99.com/webroot/img/files/karobam.pdf
    • http://www.cemeba.com/uploads/ckfinder/files/47615005665.pdf
    • https://khachsan295doson.vn/namthuan/images/news/files/fumek.pdf
    • https://chief-moving.com/editor_upload/file/62580597717.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139b5faa2777---wefegilozodamoti.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=drag+race+thailand+streaming
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d116.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD116 16792 bytes
font_01_sfnt_off0000e92d.bin
12bc832b48823a71ab87690a5ba847938496191058f9235a9fbc8366d5d585cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 10700 bytes
font_02_sfnt_off0001014b.bin
72d2c8c99757699b348b8a3f40e6a69b03d004a0ed7d48a35c34792c7764152c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1014B 18260 bytes