Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f4a3d0c43f6220…

MALICIOUS

PDF

74.3 KB Created: 2021-09-06 05:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 76c1d59a4615b5344705760b1404c42f SHA-1: d6fb5b342cd98ff469bb74440aaf298c6575b654 SHA-256: e3f4a3d0c43f62207cb1f254e07e8b6e232177c87fdefa1f4c91678bf99a20bc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of numerous external URIs, including one pointing to a raw IP address and others hosted on compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the heuristics and the detection name 'Pdf.Phishing.Trojan' strongly suggest the PDF's primary function is to facilitate phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=invert+colors+preview+pdf PDF link annotation
    • https://fotoprint.lv/downloads/file/galonazunawezuburadumofu.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/57703872653.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/tuwapolag.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/8fhkef44unq5r58pevievgq1dt/tojugepu.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/5826292045.pdfPDF link annotation
    • http://botosani.ro/img/uploads/file/dugesixu.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/kugijiv.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/fuxixufipemabivise.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16121a685d7f54---lipovakegekox.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/falosobesedugasosore.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/zalidejerirufupo.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0c230762b---63492594549.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/gibajelexelar.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/lizoxuwunisobudopujerorak.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/vepolajizupe.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/sosuvibatefawasuwoj.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160e17c282472b---pagumafiliwabesev.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/aa38f2268bb79c5b2f30b5a247b46515/10805696540.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/72722816014.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/68523159494.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/46645265004.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c2ae7cbfe---lolunitutopowabizixarovoz.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160917e3b92652---lewoteribogovam.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103b4a9a7a94---kiluki.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/79565421816.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_off0000bedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F6 10552 bytes
SHA-256: cf14f3c559c112801e9e652d793c477d51a3587b29874ac4e1d4e9fd841439f1
font_02_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 17080 bytes
SHA-256: ef25ad9f1de59953a3788976adab5271500b7323fcfb4704576c53d74e9445a9

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