Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4286274a4b0e40…

MALICIOUS

PDF

75.5 KB Created: 2021-09-01 12:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0c0654b2940344b610cf613d40ac0c68 SHA-1: 8ca34d59ad480f62f985ba2226187f3e13164d6c SHA-256: 9a4286274a4b0e40bc8feb5a341b7b9c0883b348953db0d387c80dcaa1652f3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malware or facilitate phishing. The embedded URLs, such as 'https://allytemp.ru/uplcv?utm_term=download+gta+vice+city+for+pc+free+full+version+windows+7', indicate a lure to download software, likely malicious. No scripts were extracted, but the overall structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://allytemp.ru/uplcv?utm_term=download+gta+vice+city+for+pc+free+full+version+windows+7 PDF link annotation
    • https://toananhmedical.com/uploads/files/wuxokon.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/kufisiwuxizibusexi.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160cb416f8bc96---wigemiminirigozopekudizu.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16125f6643b83f---jumerosexipozalafu.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5fba679f1---jenanodow.pdfIn PDF document text
    • https://bloomeng.com/uploads/tuwopoloze.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/10720544666097c102141da.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a3895de5c1aa8f94143eae1021813b65/81741554288.pdfIn PDF document text
    • https://shibbirs.com/media/files/37631573940.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/bd795687b8c83f73c562628c62e3e1b4/birigekederivotom.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/vorukiburufewu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f054d5baf7---85242812776.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/nowutefugamujupimivakuwij.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/rimerirugozad.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/vodupovawenokiru.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/43flerplqd47ine0dmoucjqtu7/1029078721.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/bad31c945f22bf0ce42b1498e1beb426/41912444096.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/i2fskakr90gcu9v8bm4v0ia19o/14284671258.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104e36d7adec---2004270343.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608134f17c630---lopozukoviwugenebad.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/68134264201.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610ba7abacd1a---56148426214.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/dakudapi.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_off0000c386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC386 11212 bytes
SHA-256: 40fddd806a3162d73717e8adfe653ccc1e1398cc98211fd3edb9c176ba27c590
font_01_sfnt_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 16512 bytes
SHA-256: 24e0bbd7eaac163635b42f2ccfc26bf99731d4039ebc86f4d7b36453f9f677b9
font_02_sfnt_off0001079c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.