Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77af4d5ee69f2c2…

MALICIOUS

PDF

93.8 KB Created: 2021-07-04 03:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9f992b6bde90e8b93319550b7722f2c8 SHA-1: fafdd370e8725ce8f74ebcc423218c8d921fc0bd SHA-256: b77af4d5ee69f2c26e620a3bf650f53ac03b2b5f77fd7e20c3723c1980a249c2
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, presenting lures related to lotteries, prizes, or parcel deliveries. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de985cf2ff---sasetomaganuvudosadipef.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/lukojozizaduzuvikadubes.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f2312d76d744c605a77fec71c049f2ba/weginebukifenoxojujeb.pdf
    • http://amctop.com/board_data/editor_img/file/202106290157.pdf
    • http://liddellgaryfamily.com/clients/863293/File/robulomubejinabedu.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/q09dp9bis0mcik46mdl1rrerp4/63783510800.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a78d8a5d53---70238415254.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aaae30830c2---51908117323.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096cf09bd150---pewetovarutofodabon.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072c8cd9eaf7---27426323518.pdf
    • http://hoskinspugs.net/clients/40498/File/zozim.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d473f71330---zukadalezedak.pdf
    • http://luluscafeonline.com/uploads/files/67668637514.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/5efe518da0105dd9cc11a5cb4b7cb4b3/12051606744.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/o1bkg33bt86f3qmptiaifhj6h3/72890247278.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077bf0ebfcb1---21275998684.pdf
    • http://gift-founder.com/archive/upload/files/jogumunuwizagoti.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ur5nt4h0e4v587rmdgsb9t2n50/lamemokusena.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4a48ac1ac---55565065291.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8fa2e5895---32858523665.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/ec89b98130406e91c5777c88308817a0/bofolojaja.pdf
    • http://adance0112.com/upfile/editor/file/burogejeworedovativewur.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/86092267650.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=computer+book+for+class+9+cbse+pdf+download
    • 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_off00010329.bin
4bf08693967ff85b69753d8b016c711900113292cdba5b3c26e5ace7d61b1273
pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 20056 bytes
font_01_sfnt_off000136d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136D5 16792 bytes
font_02_sfnt_off00014eec.bin
c74be965811bd140fbfb0b0a783adfc918fee0c060fb53fae54b7377c1280d4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EEC 11304 bytes