Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c000a9116834984…

MALICIOUS

PDF

95.4 KB Created: 2021-09-04 03:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 432d783a69bbf2e087971dc8002295f5 SHA-1: bb3c265683cb6acc0b2f1f8a02a9f4574dca4201 SHA-256: 6c000a9116834984dc7d2ae859e487230323bbf2feb49b1e125a02458444ff58
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://philabc.ru/uplcv?utm_term=garbhinikal+ariyan+malayalam+pdf PDF link annotation
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b81f0b1977d---86201667996.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1612183af188bf---pitezewivagexixetogo.pdfIn PDF document text
    • http://exosushi.com/uploads/files/42112122883.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/96785675860.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/1ofuig2ft6qud4oorcr7429n9q/56715369457.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-12/20210512070925387520.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3e25b2c44---pogines.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4ecaa7775---tejawesab.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/mb032vfgba06jo0ael2c7dusqb/26457036091.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/93295587144.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/nesivarejiporena.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/aa5fd1896f0f0ccd021f8554ae28a60f/jagexakigab.pdfIn PDF document text
    • https://bibliothequeanglaise.org/upload/files/wazivuxa.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/75faca76008b5161114bca9b95a6014b/60906980891.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/5baf4dd861bcf6f9a8e6457c66094111/49888668248.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/gmo2eih0hs96mb5vqn9mn48d9k/50956622089.pdfIn PDF document text
    • https://castel.ro/userfiles/file/makuwuvotadakekanozobew.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aab96f193ab---18726715754.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/nidasakadalejosavorife.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/seropez.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4bff268a86da5b2c045547e2333687e8/12855112535.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/ponidozajatole.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/db951ec65b766949df23bb2b314fd69c/79522463593.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC55 10632 bytes
SHA-256: 3aef7acefa6afbb72dc644ce3cd9cfc7b45c382547b1de6412adc2f42d523e44
font_01_sfnt_off0000f41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 1840 bytes
SHA-256: e11639021ae82bc81d66597892112dbefd7f2cb67f426bbebb6fc3c29591e729
font_02_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 25672 bytes
SHA-256: b9379307cf537ccd94ff4dc455277bd66b6f01831544d492c329f7dc07f8e056
font_03_sfnt_off00013d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2C 16652 bytes
SHA-256: 9c1dcb60196ddea3b8d0ad3985fb045c4760fe93880a04f8bea5113054b8825f
font_04_sfnt_off000154e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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