Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bcdb453f4e7d90…

MALICIOUS

PDF

74.7 KB Created: 2021-07-19 08:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 720d048c0739b28680a8af1fba26661d SHA-1: fc077a04cbcf0675e302b92cb9d280e612a481af SHA-256: 32bcdb453f4e7d90239cf5fb48506beb1d8924c2cac8e0968713fbaf7ccbc56d
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL targets are indicative of a malicious distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160887efe3e72d---lasatewuvedakovurinuza.pdf
    • http://hanart21.com/files/userfiles/file/22205287957.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/9755c804a30d00546129c0b2c0034712/89246195004.pdf
    • https://actaviaserica.org/board/file/files/50623248303.pdf
    • http://dambi.pl/userfiles/file/75163671290.pdf
    • http://hglobaltour.com/FileData/ckfinder/files/20210611_20ADBEC355AE1173.pdf
    • https://unibel.pl/pliki/upload/file/jikigezureliz.pdf
    • http://iaestedresden.de/userfiles/file/5518371524.pdf
    • http://aivieksteslaivas.lv/userfiles/file/vobonegefelenevux.pdf
    • http://kgmda.com/upload/files/28359473816.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075137349423---koruseje.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a6a18beacda7b379b3a91763c8a21d5a/rodifuvapokedufa.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085c2813ccf7---risosukuzugofejibawevar.pdf
    • http://aarogyamedico.com/userfiles/file/4459018269.pdf
    • http://beastyenergy.com/userfiles/file/jupepafew.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/k6arpk7lebbphbv9itslecnbf5/sozofumaxolevawemig.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/o26rsn5m9cgul01rob4ohceas3/65532619472.pdf
    • http://hcvitamin.com/webroot/img/files/mobawalejamezozugibuta.pdf
    • https://ludifrance.fr/userfiles/file/52501831143.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160be364fbc9d3---dusebimubemupedimupinavo.pdf
    • http://cnc-soustruzeni.cz/files/file/10925782127.pdf
    • http://ok-poland.com/userfiles/file/29319449631.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/9m92g3f0ft47dtml7glt8shb0j/pezofijanurerodebotetu.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e124192b6f4---fisetejoginix.pdf
    • http://biomassasia.net/data_ed/userfiles/file/6441126506.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sql+where+multiple+values+in+one+column
    • 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_off0000c0b0.bin
ff2639f2622e756c675c29d4f118cf61b54cd38b5572bdee42d784a57c9e575b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B0 16492 bytes
font_01_sfnt_off0000eb62.bin
e93cad88f23836b4efb8cad4834086c72ad91818a42f07121c687ae767881325
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 11112 bytes
font_02_sfnt_off00010530.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10530 16792 bytes