Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb2907e34540046…

MALICIOUS

PDF

86.4 KB Created: 2021-09-18 03:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9f09d528cad744b73b3964fd93558f1d SHA-1: 4bb822bd911bcd571aec62d24be8e1b05214a0ed SHA-256: 4cb2907e345400468811c3ac9cc2f9f97db1414365b41f405313038001ae1276
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a tactic to obscure the true destination of the links. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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
  • 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://huntic.ru/uplcv?utm_term=how+to+root+android+with+mac PDF link annotation
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fb457ebd2---jakavinafutepoxejaxow.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d1fd4dbbe5c37eb7d810469c0c0c410a/21987183634.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/20095051196.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/85015402848.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/37170207902.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/80300790030.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/rafisuzukewaxilu.pdfIn PDF document text
    • https://rm-parketi.si/uploads/35893143179.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/89024303299.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/laribezuzarepixar.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/raxufapubawutaritu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/aniposawu.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/32374435316.pdfIn PDF document text
    • http://bluebossa.pl/files/file/43501360157.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/pifepanaxuzojuseri.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/7961550284.pdfIn PDF document text
    • https://hirurgija.me/files/metazojeluvowavidapuworab.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/wunupiv.pdfIn PDF document text
    • http://vititanon.com/user_img/files/38856647675.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/popegaduxudimurumesimap.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/rokewix.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/64391674074.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613461ac4626e---56666018006.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10391 10368 bytes
SHA-256: 84edc582fe1a82bbc4c28b5287cf443aaf5fec2b2ec6b8607fa2a3b354accfc8
font_02_sfnt_off00011ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC5 18636 bytes
SHA-256: 75384acf0a1fe768bd143bdc3bc63c9bf70f322bc67dda2b10110ff1f42efafe

Open this report in the interactive analyzer, or submit your own file for analysis.