Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d1303692f2e9b1…

MALICIOUS

PDF

87.5 KB Created: 2021-08-26 02:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e7f552d3e6a6f424c6a40eb2c1ec12f1 SHA-1: d3068b416d87de9821a5aa1a8d14b1f36b819f89 SHA-256: 07d1303692f2e9b1e1f1808a48c2bf9102163497b20f32062551ad465a133e9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites, functioning as a link farm. These links likely lead to further malicious content or phishing pages, indicating a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://laborke.ru/uplcv?utm_term=thank+you+for+your+love+lord+lyrics PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fae4924cf14---mulalobuwaw.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610297a14c8f0---jukerujepibuwov.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/e180b85374d9f9e8439501261f224d0a/85269410867.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/51321246036.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/gexuwipetimaro.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/ravuvemifizevikapidemuka.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/jutonobususadifigul.pdfIn PDF document text
    • https://dhesient.com/media/xujawe.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/34367492751.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/81253932999.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e4b58b4aca1e9629a6118c05f16b8357/warovuxomozetojuwivarago.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/4381287136.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f5e712a22cffbab2e7bd8688e5f7d6c8/gasogisupizixaxaregazega.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/85480606236.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/22e2645c58b1b9573d3ee21510d2a771/kojibumosiboxugaf.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/jovon.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeacf65c30---xalipo.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/57010584849.pdfIn PDF document text
    • http://njchemland.com/upload/files/80759560586.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/7fb98b5678282749f549440821d0bbe7/tibafetiferot.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/3825819058.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/kivexaso.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/14074327143.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/bubugibufifipokogegu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 16492 bytes
SHA-256: a6646597676e4b22f2403a2fa907d6104884c0a8c9df5e9a680a456775b02a06
font_02_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 10808 bytes
SHA-256: 68dece9a088db89e402d7c1f02e8aa5a19ba4eadfde93cd102e58a6ac8c2468a
font_03_sfnt_off0001378f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378F 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46

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