Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0068c1bb4ed337…

MALICIOUS

PDF

89.9 KB Created: 2021-06-27 20:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 950a47be86e971dad021c07d1cf0acec SHA-1: 8924f9fac119e9a8659ea6da86ad03a37e141739 SHA-256: 7a0068c1bb4ed33758a6c1862054254cf33ef4532ff37bfcfb701518177f48b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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 https://philabc.ru/uplcv?utm_term=ratio+and+proportion+gcse+questions+pdf PDF link annotation
    • http://mchs67.com/clients/6/60/601da637195afcc8544498be66ee72b0/File/45379843761.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca6a6a8503---47066915215.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/53535645094.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/piwotososof.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0ed49f104---20268685605.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/xewupomuzomofabaxore.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608145e993008---33682385797.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/eee93b218215805564100c9acb209d2a/wajumuvidepuwobutus.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c50fb3723d1---xokazedagagozolejumu.pdfIn PDF document text
    • http://change-sexy.com/files/files/43684667092.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/74312598535.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/21834804959.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ab3885f05---puzawikoro.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/1806d58eaa1cf39829d976ae64d7b1f3/42471631475.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/806fd1674b35d84497ad548dba6b6eaf/toripirid.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/juzuri.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/c21c2f401ee1a793b7da990f2318d9b5/kaxeweropodapojajufupeza.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/23243931865.pdfIn PDF document text
    • https://mauspro.net/upload/files/nuzaluxiripuxirifafite.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/79311894141.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/siwamotel.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/arrb3ofgtmsqe3b986irk8lc69/muvatibobupe.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/1rnbufb26kkqfq4mdupmf8rae2/fidesidesugafimusupuge.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_off0000f92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92C 11040 bytes
SHA-256: 53c964842802ca58b66ec911ad02a11b267b32f6dc779451bacd48ea3a8ff9cc
font_01_sfnt_off00011280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11280 18032 bytes
SHA-256: 707c1d5d18fcc433f24057654b63f3ce926541ea629f7b14b4b79af23a4276c0
font_02_sfnt_off0001422e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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