Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70f7f1fad42b44a…

MALICIOUS

PDF

83.1 KB Created: 2021-09-13 20:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b55419d10f6ef4d0b91e86ff3cf6cf9 SHA-1: 97f547b32f04d6305be13ad1e9717059f2201774 SHA-256: d70f7f1fad42b44ad8a5590f2072f18d7c5421cbfdc06b45f94bc6c5749754c5
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the nature of the hosting indicate a phishing or malware distribution attempt.

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://drafthe.ru/uplcv?utm_term=traffic+rider+hack+game PDF link annotation
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/2932262804.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/nafufesiveg.pdfIn PDF document text
    • http://sbkf.org/files/files/gidoxalusojujerekeris.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/96870236700.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/2ed9de8129b0639964783c0aa753ab1b/lokaro.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///36726966191.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362e5c85d1f---fizifugeledipowevipa.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5fdf93841---31569840903.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/95342380711.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/71166107782.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/6888624541.pdfIn PDF document text
    • https://parkettworld.com/upload/files/pimasesujikenutubadova.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/12098725199.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/21814908330.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/20420999733.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/clk5h805nqbq5ds89mt0t96s56/42424218575.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/48949405664.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/lalekavitodoko.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/2459260905.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/vefosagobijenixiwileraw.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/77489939461.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/jukenirura.pdfIn PDF document text
    • http://savemaxint.com/files/file/tuvafepugizawiwiwavozemor.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/59265549063.pdfIn PDF document text
    • http://xeroxexpres.cz/userfiles/file/sixurotozojonepewa.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_off0000e217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE217 10444 bytes
SHA-256: 2c4a74358ef4aadea9910c09f87d1732b5b1df4f39e850a38debc8c19ea9ed01
font_01_sfnt_off0000f993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 17372 bytes
SHA-256: b2dd4c8ab7083bf677018004ccaf86adcb90be9a266db2d2f06d5d155a8af8e5