Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e05edebea9a7e5c…

MALICIOUS

PDF

68.5 KB Created: 2021-09-28 11:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fa826486d3da75830b293868193785c3 SHA-1: dc5e6c6877c19a30d280b9b10a8cbe6af55bea08 SHA-256: 9e05edebea9a7e5cf2d741858bd561a456853e0b3881f50887d190ac2df959ed
176 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, designed to redirect users. The document body is heavily obfuscated, preventing analysis of specific user-facing content, but the overall structure and URL patterns strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://elma-itc.ru/!upload/files/24209229451.pdf In PDF document text
    • http://jamalcar.com/userfiles/file/mozibodatup.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/zigureledixumunabajuvepam.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137ff5dee9e2---kunatakupenapefuselepe.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/8963e34f23c7d46d067bb6a198394bd1/suvogirupumenemeda.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/74711317526.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/mapuxufefedo.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/gikavafux.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/27c0ce8fd545b3f893086f4d72c72eb2/govobox.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/zababejubedu.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/60123210957.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/76232897494.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/rigisowalag.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/bupesupogeges.pdfIn PDF document text
    • http://noithatmfc.com/media/ftp/file/53193403653.pdfIn PDF document text
    • https://egca.fr/userfiles/file/nowixakadutelipozetita.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/470dd7091bf4324d0e7b386d3f266437/77729637871.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/45110395262.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/4536532470.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/6nl31nlpc3uhp7sgs5k2h8lf9v/80888450459.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/67058023712.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/42131260743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=android+auto+wireless+supported+phonesPDF link annotation
    • 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_off0000afe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC800 10656 bytes
SHA-256: 22878954e869977c7659eaf4c7c82071ca640e6b0d6a7c652ef5d632d8750f34
font_02_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 14304 bytes
SHA-256: 2447c5cb3fb323e8fa2c0ad786af182c6a8b1659b90840c34da74d9ab6deab67

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