Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc79f186fac6187…

MALICIOUS

PDF

78.9 KB Created: 2021-08-05 04:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 764f1167042e9689c1e6147913cf11ae SHA-1: 331d8a99fbb5ec8d93d8cc2f1accab918f3c8ac2 SHA-256: 9cc79f186fac61877998174ef91b82692c1709afb65104a0c145eec28bffd63b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall detection profile strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=an+introduction+to+genetic+analysis+solution+manual+pdf PDF link annotation
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e52be31018b---5744921294.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a21fa55da---99827401507.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1a6d0e754---32678311451.pdfIn PDF document text
    • http://2440027.ru/upload/file/tapisufipomiwa.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/vuxeduseniruseno.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/7e65e533dd3168a017f53b4c81e9c768/10144489805.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/vps5477ng0lghhqkq05u1l9h65/funifopinadamepasivako.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/zidisaw.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/kamusodedexego.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9033a1f5e0---jujasajifitevi.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/popunukalugirazemapi.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/4879870507.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/bolapar.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/50152894570.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16084082c063c8---84271471708.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/94765574673.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610608fe08cff---88065795597.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/57815131201.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dfb6294f2---86986553692.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086f8714fc66---soribafadujesa.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/11179583650.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/guputozegaxumunorisomidig.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b514d64343---suvixefobuduforula.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/97889745705.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_off0000ceb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB0 17084 bytes
SHA-256: e0accba7fdc01b54a45c3c337ebf8a134aaaa382e277d1fe594cee102918afee
font_01_sfnt_off0000fb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AB 11160 bytes
SHA-256: 3046e1c1f6f72b46093d95e59509555e4488bb8646bb877f0b13b8289a31b8ed

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