Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b23085b9a7446a…

MALICIOUS

PDF

87.5 KB Created: 2021-09-04 02:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 671f87a7d7c80522439803f865be5233 SHA-1: 870839c95acc30135c53535e719f070e8cf36463 SHA-256: 69b23085b9a7446a0036b1462c288e6a6dac829f691c1303dbeb3a227cd8e0c6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains numerous external URIs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The presence of these links suggests the PDF is intended to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=sociologia+em+movimento+pdf+download PDF link annotation
    • http://worldtile.net/jangheung/userfiles/file/61335088543.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/gitufelosi.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/lefet.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7659935c41---40549380371.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798ed0de5d7---fafelelugatotorumi.pdfPDF link annotation
    • http://keralabiblesociety.com/fck_uploads/file/79870024583.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/gegerujas.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/wibanizulanubadozori.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210726_003124.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/durezitimixo.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/pibusanekelumolife.pdfIn PDF document text
    • http://promador.pl/userfiles/file/94115057126.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/11825007552.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/2229814698.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/ruvefunim.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/11196270019.pdfIn PDF document text
    • http://caramelitos.sk/files/52605420263.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16076e8c0599e0---movobamitolipawamugasuz.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/718f433e97b34e05f39de25a81295132/zozoxubate.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a17935777f4---19080916539.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/nekufaliwadib.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/16541149469.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/lozukiju.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086947ae93e8---torametagidoleje.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_off0000ed22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 18920 bytes
SHA-256: b77a514d45f3febadbc4e49298acf8592470cbb678598de154a4ae34b2ccf7e9
font_02_sfnt_off0001371e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1371E 10924 bytes
SHA-256: 626fa701003474708ebdaae841a2f31f1fc3319d087fceb8832833aa4995ffe9

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