Malicious PDF — malware analysis report

Static analysis result for SHA-256 9712b01d02efd85b…

MALICIOUS

PDF

70.5 KB Created: 2021-09-27 20:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b443b9c4d53ced7b5d4500abcd30841d SHA-1: 2bc0b3ca263d64445eb4b14a932f5a93f9d2b2c2 SHA-256: 9712b01d02efd85b0e2d4daa5886c96824fbbc725346ad1a262767d28afdeeff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicative of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mitito.pdf
    • http://i-p-p-c.com/ckfinder/userfiles/files/57052255529.pdf
    • http://bio-scan.com/userfiles/file/67301222770.pdf
    • http://fertilityupdates.com/userfiles/files/83729026985.pdf
    • https://santehsevast.ru/userfiles/files/88361450736.pdf
    • http://leoclubmarsala.it/userfiles/files/zagimapomi.pdf
    • https://indiantiffin4me.com/nbloom/fckuploads/file/78982675490.pdf
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/16143084559.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492218cb542---tubezotivivaziboj.pdf
    • http://vladjurnalist.ru/archive/file/80369341124.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/79081570080.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/100290395385cde832f8c2d1ee4db079/31522298539.pdf
    • http://lnshiyue.com/userfiles/file/20210921173206_1411511581.pdf
    • http://globalroomplus.com/bot/ckfinder/uf/files/54071814022.pdf
    • http://yasairamenbar.com/uploads/files/gewepuvomalisebebevosawo.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/dab4edf5377eff8663a16dc82b1a3ee1/55957449908.pdf
    • http://dakov.hu/_user/file/76922735050.pdf
    • http://ip-golubev.ru/ckfinder/userfiles/files/18181396222.pdf
    • http://marasintl.com/public/ckfinderuploads/files/waxuwafomigipuvivuper.pdf
    • http://www.mariabeckmann.com/fotos/uploads/files/tipijonadoxoli.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614b26a6c7ddc---datoletafekivalubomok.pdf
    • https://footballsod.com/images/ck-uploads/files/88020270969.pdf
    • http://hankyunget.net/userData/board/file/27960432511.pdf
    • http://justsayhi365.com/uploads/file/95972169568.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=that%27s+not+us+watch+online+free
    • 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_off0000b0e0.bin
ace87d9fa985b7596380cb7817cfaae3dd4d376bb27b1d3213884cfa49dfdc4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E0 10616 bytes
font_01_sfnt_off0000c939.bin
db11cfa0cbfdcfcc8912d889770ac20221ad183cb47c122ec15a4cfff628ec6c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC939 16684 bytes
font_02_sfnt_off0000f409.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 16792 bytes