Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42070019fb5198b…

MALICIOUS

PDF

84.4 KB Created: 2021-09-23 15:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7cc4daf5a4bb5e720ca1d7a48d131469 SHA-1: d6410c42835cbc812e7658182508cf0427870afd SHA-256: e42070019fb5198b51c6a55b667ec6fb073dfd3bfe4c22b8c37a1bf169308af1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML and ClamAV, exhibiting characteristics of a callback phishing lure. It presents itself as an official communication, prompting the user to call a phone number for issues related to billing, refunds, or security. The document contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites or download further payloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crewmak.ru/uplcv?utm_term=unturned+metal+plate PDF link annotation
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/vinibiriraxiligisubiv.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bepanobifuxetateruguvum.pdfIn PDF document text
    • http://104408017.linker.tw/files/sisusadumatofexub.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/50785726178.pdfIn PDF document text
    • https://eurotig.ro/file/dobere.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/dobejefobapojisufukifaf.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/sulegegiwekejiwesiterova.pdfIn PDF document text
    • http://apsons.eu/files/file/47487877989.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6bba5bf29---81267615471.pdfIn PDF document text
    • http://twtqedu.com/userData/ebizro_board/file/tozijetorobo.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/delopifuviboturowuxozuz.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/zopopuvumij.pdfIn PDF document text
    • http://parfumland.sk/upl/dubefuvakujafawinu.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecb4793ce5---xakazilegasex.pdfIn PDF document text
    • http://e-district.org/userfiles/file/15337413038.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/89667492529.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/juluto.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/sijiboduzonuj.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161482820c7b6a---82562995675.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/roxamelijedozunidu.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/votepixuxogunoderamok.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/47635379403.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/gizitazujijitalerejeron.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/24096268902.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137d27857990---sujofenurula.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_off0000df92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A4 20908 bytes
SHA-256: ebdc86a9ae78c4c1a52b2fa7abcf8aadc011080d38c3aad7a0fbe00b3746e1fa
font_02_sfnt_off00012d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3A 10280 bytes
SHA-256: 9199cdff7a728982358be4241a4aec7d3812ec75ce712ef463364ff657aae5d0

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