Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1518048fd7afc2f…

MALICIOUS

PDF

85.3 KB Created: 2021-09-02 02:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0e87b97e9670aee0a462375a30fbec0d SHA-1: 361ba380d427982ab6b329ed9429f15d9e594b01 SHA-256: a1518048fd7afc2fff78f7185986c1fa9296e76245972bdd35c3a5e03d3aaea2
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious sites. The document body is unreadable, but the presence of many links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://warwick-ems.org/userfiles/file/86293663616.pdf In PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ff7bbbea9c4975952756e2048b56bd7a/mewusolupixesaxibamipup.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/10022583908.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6252af2e5---jigakusoxejejeman.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/7cmk84nokrnq4r762usf9c0jb0/xulufiwolo.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/982f059793e0df38439f6186451d6827/13632008731.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/91928055630.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/71566348033.pdfIn PDF document text
    • http://humanlitech.com/files/files/mivofewagemukifofa.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/87076689735.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/6fa6ca5b82e40ab6e3a0a17c258f0b6d/budeta.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885e4c2d407---21051027074.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/bivujirejepazetagopilipat.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/23baa5c951113ec1283f08815e0b141f/13307681875.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/66858184124.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/wigovinukur.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1ce2d7c9e---90685952795.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/16142343487.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/xarujaveluxurivumotome.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fe8227d7c---regoratalozigejubojafago.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/sojow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+interview+1998+full+moviePDF 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_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 10792 bytes
SHA-256: bcc9ba3ed637f7b0d5a27470247e7dce3d3627908441a808a93d45a5b01d5d5b
font_02_sfnt_off000111eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EB 19340 bytes
SHA-256: 070a85a85892b5b977be6c33171aeb9f6892499083f5d4d8eef43c0f024839d7

Open this report in the interactive analyzer, or submit your own file for analysis.