Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b7152172a847cc…

MALICIOUS

PDF

118.7 KB Created: 2021-07-01 21:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d547365caceef11e9302af3e866574c7 SHA-1: 98d5f82b294f21c0744a3051c14672b2a85ecba0 SHA-256: 89b7152172a847ccdd2526886e5a0a9b0bd9683acf2d70cf047c3070036d787d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://domeinbeverdonk.be/assets/files/file/kuzujujesewo.pdf
    • http://logistra.fr/ressource/site-image/files/xevetetomoxoka.pdf
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/wejidubuwi.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea9671dbfa---87037637974.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c2056b8e4---78003601377.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf41ee80ef---laletoji.pdf
    • http://reicar.dk/userfiles/file/tuzujisawujanupef.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b10c8961543---putizuzigifunefej.pdf
    • http://sity-luxe.ru/userfiles/file/48408866970.pdf
    • https://home-consult.lu/userfiles/files/96295503417.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607789506fe0f---dugodu.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/b123f6f729b7eeb8102263511c5141cd/49241095888.pdf
    • https://dollarplus98.com/images/upload/files/15418151606.pdf
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/14932009338.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/42pi7e00h7sp2ogvljsusahdnf/14123293234.pdf
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/11110694260.pdf
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/eb7b7869a9be9754fad2ccd2cdc456aa/80498283513.pdf
    • http://szkolka-wiercioch.pl/files/file/94395493954.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083fae74ba06---narobudakexuboririketuju.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608900ad284a6---1538608272.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9be1a726655b0be765259e122c62afe9/96096829441.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af72ba44e3a---40690869135.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606f090cc855a---79010177404.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/40466989377.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=macbeth+packet+answers
    • 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_off00016e6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6A 16792 bytes
font_01_sfnt_off0001867c.bin
8743ec444479a48ee8bdd4665c60a85afeb2d09cf29dac2d2e7fb9759fbd713c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1867C 17772 bytes
font_02_sfnt_off0001b42f.bin
f76961c4673b3ddac59b7a2c0a0d9011001e5c400122c85ed0867abfe8a06b16
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B42F 10524 bytes