Malicious PDF — malware analysis report

Static analysis result for SHA-256 92bc7c1a3eb5a35b…

MALICIOUS

PDF

90.5 KB Created: 2021-07-27 16:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 194c292e1e8a1f2e4688d1c6640f0f52 SHA-1: bea564bfa1520c557f81f5971bee9ec4baec9c2b SHA-256: 92bc7c1a3eb5a35b7351474ed176aff5596998e52b091fd418ad5459272e2a30
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URIs point to compromised CMS uploads and link farms, suggesting a phishing or malware distribution attempt. The ML classifier also returned a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16077a64fc8b8f---pepizewub.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/q2s128ukvssl6nnhcfse8obqam/50703655494.pdf
    • https://angkaganjil.com/contents//files/21459593497.pdf
    • https://uleshuzataruhaz.hu/files/file/diwenedo.pdf
    • http://canoeing.by/pics/files/58579713179.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/0898ad8a0107bdc3fd8e7bcbda6015ad/ruzozorirekosedixabu.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e12d4eb89---fodezopodojerovakoxamil.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071c6643a48a---fatutudatanujedudi.pdf
    • http://uctodane.cz/UserFiles/File/65799327565.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/1127488f3057f28005efe15c19522381/89756820740.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/bekozeka.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bc10853c5---13802766556.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/et56499d4ll7hskljv4cn63oe7/livamikixas.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/191d59b14354cf616ca131b48a594569/mibilol.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/v9t0dm571608f0o17d4a7f4sgo/70252577781.pdf
    • http://plncse.hu/php_data/file/suvuzanavese.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/144bc030fa73c9f1803471d266f00873/kukojajuzejopovo.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d24169139---79792268373.pdf
    • http://yizhu580.com/ckfinder/userfiles/files/keriruzelidavak.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608e435ee165e---54972152862.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7cc4a26f4---59291869108.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6f18d6c84---galapoputekejabetepoledi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=minecraft+1.16.40+apk+oyun+indir+club
    • 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_off0000f2d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 16792 bytes
font_01_sfnt_off00010ae6.bin
fd141f9968067d88a0e7c346ace177aedf76f1c3e2aac4914f017fc95460d7e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 22116 bytes
font_02_sfnt_off00014093.bin
276ee461469e15c38a1aa07be3401df48317d8bd28bf4cb53211b86b564b9389
pdf-font-stream PDF embedded font (sfnt) at offset 0x14093 11372 bytes