Malicious PDF — malware analysis report

Static analysis result for SHA-256 602c004ef2c396f1…

MALICIOUS

PDF

78.7 KB Created: 2021-09-22 09:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: dfd71c18258be30fc51ae9f96edbfb07 SHA-1: a033eb1a356188e1b564bfe9a5f25aa89a69fa17 SHA-256: 602c004ef2c396f1a141c044848e4cfddf9bf4ba649fd0b8852eb23faccf109b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting it is designed to lure users to malicious sites. The presence of a link farm with UTM parameters further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=roblox+unlimited+robux+2020 PDF link annotation
    • http://officegate.biz/admin/fck_upload/file/54611739653.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16144722c6cc22---31581700476.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/27079954204.pdfIn PDF document text
    • http://exosushi.com/uploads/files/baxox.pdfIn PDF document text
    • https://arendic.cl/files/selakegikir.pdfIn PDF document text
    • http://blgjad.com/upload/files/57228465975.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/0f5f27d40d5bd40f6dfbf227b31ba9d6/dizavesobozojoxofasok.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/54904137448.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/20511661738.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a74a4ebad---nilav.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/69961190434.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/xediwalevisapanogojebomak.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/68914964029.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4867400137e70703f31b1d7c7cc6423f/xuwagesivuzu.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/23qmckagscbt8tg1o2f232um93/rugepiwonazavodalerab.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/62366316219.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/79595013647.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210903074922.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/9ff6e01b01ea19381dba043acbffb747/77146537422.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137bc886e793---lesijad.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc6063675e---soxetibizor.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5pc6j3lm2mnlc1o9500l0brvk4/tusevopererofoxorasovaj.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_off0000cf69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF69 17384 bytes
SHA-256: 57633b83741a7a8ee31bf33d9cfed5f2b2c9bc5767beaaf58f1413b90769b3bd
font_01_sfnt_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C7 10708 bytes
SHA-256: 29459642ba5dacda784150266a410569eea4b138337de3a155ecd916bcf200b3

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