Malicious PDF — malware analysis report

Static analysis result for SHA-256 af67a6106cca17e4…

MALICIOUS

PDF

67.9 KB Created: 2021-09-25 16:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 702cd57d767664dc83a6e6ee5c165483 SHA-1: 410226659bc1be26d451ef67460ef1726048c870 SHA-256: af67a6106cca17e4e15a05a4d5ca1c3eac3b242e41ce6de8e6cad37bdffc1c3c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link, a common tactic to redirect users to malicious sites. The presence of multiple links pointing to compromised CMS uploads and disposable hosting further supports this. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit user interaction for malicious purposes, likely leading to a secondary payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 67 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://pokemom2.com/uploads/files/bejedexe.pdf In PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/kagijunuvudubinatigeti.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/44701209278.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/9314815817.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021092104455073499.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/tujisena.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/dulumufodilemezexitefune.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/sarofusagelononum.pdfIn PDF document text
    • http://cpils.com/userfiles/file/zarirasijupedeniviveder.pdfIn PDF document text
    • http://aurora-c.jp/files/files/lotijigatibijilemidufete.pdfIn PDF document text
    • http://falconltd.pl/cache/file/dodofonoxunux.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd1ab5f1ec---10492413506.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/mulepobemavojawakamabe.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613599541b6ee---wakavewufijixidazabaruz.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/5102341262.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364b0da9c59---28309071428.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/23975160223.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/50487878115.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/99308347786.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/45984856308.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/66919955000.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/87688874337.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/47072098867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=move+data+from+one+android+to+anotherPDF 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_off0000af48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF48 14168 bytes
SHA-256: b683e6b339813a52665485b395f9be33e203f24ba5705d357a50bc32184216c4
font_01_sfnt_off0000d29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29B 10464 bytes
SHA-256: dc30c2b8b0018a14d27fb9260618852752d0aa5757c2eda5c2f3a510bfc5719d
font_02_sfnt_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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