Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae360ab8a72f898…

MALICIOUS

PDF

75.5 KB Created: 2021-07-22 02:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 19ac29517ca641dbac026524f0a95c60 SHA-1: f29801b6431862fd085da4af109e46555f5446a3 SHA-256: 9ae360ab8a72f89882e02534eb14b2710897418e08f3d5b24254f6f7ce8830cc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing lure, specifically by presenting a fake CAPTCHA to deceive users into clicking malicious links. The document contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://amandamaitland.com/images/file/bosukolenuzizemowugelopu.pdf In PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/7i159lk1olkr8qbphvftel8ijt/letoritogivigem.pdfIn PDF document text
    • http://c-amc.com/upload/files/42391321829.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/zumexojemos.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0bc1ee3ce---86164423909.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/mokanisodositukurogitiwap.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fac3ba31d0---bexijuxapujemuz.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d15f01637b---filuzugosuvobadiwe.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/57583421309.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/8784279196.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/hvor34fmanekuugtmb7ors6c5p/jigogoxexawowixujona.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e584096c3a2b18fcf58f02430131d9ae/62486309769.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160925210b2a3c---25808794656.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e1d7625bf---muwig.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/63864764d7017b0d55d2ded489acf780/41477712686.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/bijamimev.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/50d11ec8828d80d05d393460dcb9ec9b/76690080632.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d9403e1684027c87dc587bb43e271380/15957987760.pdfIn PDF document text
    • https://megashina24.ru/files/files/80516568620.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/52321590646.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ap+calculus+ab+textbook+answersPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 10776 bytes
SHA-256: 79140b374042da6e5cd83607c65a39555392ac6604bc11ffe65fd9cd8c1a56c0
font_02_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 16344 bytes
SHA-256: 60ac986c4d96cb06ba23ac1dbce1f608d7bd9cddccc60fe52c234a276ba53a8b

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