Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdba025d478b7d5…

MALICIOUS

PDF

86.9 KB Created: 2021-06-29 02:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0b3fb362baec096f6bd20427228b5c5 SHA-1: b73982898d26937735429c19de1ea991dceafd6b SHA-256: ccdba025d478b7d5239d1866752a90ecfdc3d1a13c0631cddab9ea1cc82cc6b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous external URIs, many of which point to compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a tactic of using link farms on disposable or compromised hosting to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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=druid+leveling+wow+classic
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/d384715f4bac1aefe9b8c73977a2ccdc/xenogasuzivukama.pdf
    • https://digbijoynath.in/iisc/ckfinder/uploads/userfiles/files/zevedaxowozoluruxuf.pdf
    • http://www.blueoak.fr/image/file/98741664729.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160baad27e0c97---37418676270.pdf
    • https://avenue102.com/uploads/file/74653106402.pdf
    • https://chiataiec.com/userfiles/Proj_Name//files/56110420160.pdf
    • http://short-story.ru/upload/file/webel.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c628751348---22906642407.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/tj0dkn18uf394kia1fi2sefadt/sutujatumodawakugotowu.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f30054721e---35334546516.pdf
    • https://abofahed.com/userfiles/file/5566742892.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaed5b63f2---dovosozujepezav.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/dtt370249ogmorc7thorh3i2ks/rifometilivid.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/50447b7f885e77d3125f753e97d03c03/rizomemivepasitup.pdf
    • https://gyn-koe70.de/obrazky/file/59114627496.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828c1550df4---37561471840.pdf
    • http://assistance.uz/images/shared/file/sapebazes.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb5eddeaca---gejitujiji.pdf
    • https://theatresaucinema.fr/uploads/file/90542661055.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90fb8706a---85900804185.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbf978f832---jisariwebikukukig.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160abdc3066723---61683050233.pdf
    • http://bawaconstructions.com/editorData/file/sebovowabonevo.pdf
    • http://pekingtogo.com/uploads/files/ramurufivuvibex.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9a5a771d438a8b0624d33d9f2e3b8973/14929892879.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae531276220---zuvupezafonekebide.pdf
    • 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_off0000f004.bin
da2d2dcd13381680c484758ba06389741508d0cf7a93f777b8044577a1de56c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 10700 bytes
font_01_sfnt_off0001087f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1087F 16792 bytes
font_02_sfnt_off00012091.bin
581fea3c7b2eca3cd1b3c382d3f920fca4731cfcd1da2606054652dccf64f076
pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 17432 bytes