Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fd00203a791a0a…

MALICIOUS

PDF

96.9 KB Created: 2021-06-28 00:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54cebabc6f9a722705b03c0581411a93 SHA-1: 60bb112ce0ad5c21e8eb2f904583897dbf96f0b5 SHA-256: 29fd00203a791a0a17fb57a608beefe8cd246199eb487fcd62cc4f5535cc8a2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986d6502cf7---74709519128.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/ngtlkrv1djqcfc43mltr813tcq/xumerilimazeziwitajuk.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b946c7f05a---rivukosadozogitodejovixe.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f21394b2f400408c8656fce6fa2464fb/pekerupewasixexavamozo.pdf
    • https://advantagelic.com/singhania/downloads/file/giwonepumawida.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608440cad129c---lidodebi.pdf
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/86897683423.pdf
    • http://taiwanglassgroup.cn/userfiles/file/50913941279.pdf
    • https://anukulagrotech.com/userfiles/file/juvazexovegofineketibe.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/2b23df2f24e8784d05bbb165fe0197db/fewebepaparimixemavuv.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/645f1eb27c1811aa87872bab03da67f2/98391960021.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/ec3301a24cb794c330f56d5553a6ab29/votekotategowufudujudafi.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e949f3fbb06d564f4896758e9898acca/vurukikowefuleval.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609553288a101---kovumuz.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607022c4240b8---gozepize.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/c82253c20958741e189585fabda54fcc/ribanefaralomelaf.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/c57bddcc716e7c173001ac1c831e2ae3/duwogob.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/71446722212.pdf
    • https://pima-alarms.rs/slicice/file/lovefet.pdf
    • https://autoprofi.ua/userfiles/file/zelumugelefidowozomoguji.pdf
    • http://yngc.ru/admin/ckfinder/userfiles/files/94656339638.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a56b1321baf---gejevojaxuredigebod.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c595b39588a---24172917496.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/fononaliriduverovaligami.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=year+9+entrance+exams+maths+specimen+paper+1+answers
    • 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_off000118dd.bin
11b3da4b38aab9c2862b45965509357fd6a3581358cf2399aabaac981da43f38
pdf-font-stream PDF embedded font (sfnt) at offset 0x118DD 10864 bytes
font_01_sfnt_off000131e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131E4 16792 bytes
font_02_sfnt_off000149f6.bin
5cd364618f0c56906631eae6abfccac996c96fa4528161cb11eeeed69f88c40a
pdf-font-stream PDF embedded font (sfnt) at offset 0x149F6 16892 bytes