Malicious PDF — malware analysis report

Static analysis result for SHA-256 851141a7ebc6406b…

MALICIOUS

PDF

85.3 KB Created: 2021-07-01 19:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f3a5af98adc96e36db010d3578e4f839 SHA-1: 7ddd58f0b253b22c6b5cf93f24c35973a86b6691 SHA-256: 851141a7ebc6406b166c11770bd7fdd8f58ad2172af5fd29be40a41c3abbac72
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links pointing to websites hosted on compromised WordPress installations, indicating a link farm designed to redirect users to malicious or phishing sites. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

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
  • 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
  • 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://oniceh.ru/uplcv?utm_term=activating+the+ministry+of+angels+pdf PDF link annotation
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/r7508evbsh4hpnkvboq3tm006g/73453551688.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/0ej8m0eadriskrpn6j2b1fn4t3/49476538151.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/916e3e5fccdef27042b41ca890b53055/85049467906.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/39oa54ua51f0vi8m9tqvalttse/79645157531.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/cos52jbjhbb7r29b4s6vl4vj2n/77235771085.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/70961812043.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/ogattmhkjj5som224egl6sfhf7/6511410321.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/cdf7aa4e09a78229aadf39066c8bc340/75078821077.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/rotoriviwilanubiki.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/75930839908.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608388465f6fa---wewuxurakutopos.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/61882361928.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//gokoloj.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160934d6200a25---lulutadexebaxukafodeda.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076220f831fd---woviraxinomel.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/xedezutuvapatetar.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/kogodeperupetuziwagexarun.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb8159ec83---85287900857.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4e8505e03---gufazumi.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ca67a2323---xisesulefiw.pdfIn PDF document text
    • http://zuche0551.com/upload/file/fogaburulamoxezuzovib.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202106160058547177.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/rhuq8uhefcvbn4mmfve100g5mm/xipuvirokote.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/nenafoxakubu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 17452 bytes
SHA-256: 7a53591ad5e23e3a879a4bdba5e7c76f349e2904ce24831b3ae381e176b4a301
font_01_sfnt_off00012f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1