Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b1c7b1afa9ea9e…

MALICIOUS

PDF

89.9 KB Created: 2021-09-07 16:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 926eabb21583e468593ead52290019b1 SHA-1: 9489812d2cfa25cc13957451fb6d591e37594f4e SHA-256: 29b1c7b1afa9ea9e5c22c59ac0dfabbd072100ef14363bfac20e36bda1951c4d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to lure users to phishing sites or download further malicious content. The presence of multiple external URIs and the overall structure suggest an attempt to exploit users through indirect means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=minolta+x+700+repair+service+manual PDF link annotation
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/79j381g10sqc252itbk6to60ki/sugovelufilitalatusiv.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/70350687037.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c118cc26977---susopilazixegod.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/87690291541.pdfIn PDF document text
    • http://jechtinger-wein.com/jechtingen/files/97197295124.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/0131c06460bea81c06475af4fd956780/37966396819.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c853c5d5ce---90457340133.pdfIn PDF document text
    • http://secretinvitation.net/images/files/kawadotajekute.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/049743db73ac3f2ef65abc2031d2045c/nimal.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090583e7c6bf---8268649648.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/wudota.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/kobiw.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/jukete.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/sivexegawajujas.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/jufeju.pdfIn PDF document text
    • http://talleresjpg.es/img/file/bejuvag.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/33634265406.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/68381869539.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/redikorakopazodetawijiwi.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/68452800461.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e64a91d3b41---bonipal.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/61832636413.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/9408979cc62182a78522ac3abc84cbb4/zifabepirapobibajiz.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_off0000f977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 10968 bytes
SHA-256: e29ea063eae78143668b37dc3fc23c47eb37c370b524455fe1ea0859fcc2a2ac
font_02_sfnt_off00012b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B17 17824 bytes
SHA-256: 1ac55cc931edb70a8fbeefcafbbafed07b9fa68d467c8021cc2bfce2c5e2c72a

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