Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe1e80784c218d7…

MALICIOUS

PDF

80.3 KB Created: 2021-09-09 17:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3abb3336fb9264d224ed39342791263d SHA-1: 33499f301c5c8de2e306f8e6654b67bae1b3d05c SHA-256: afe1e80784c218d72ebca595e28d5d33f27dcdeb1c8f6f7606340571de181424
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. Heuristics for a download button lure and callback phishing suggest a social engineering tactic. ClamAV detection and ML classification strongly indicate malicious intent, likely to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hon-ro.hu/userfiles/files/kovidowaberolez.pdf In PDF document text
    • http://ekorob.pl/userfiles/file/9214818500.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/tikojokezad.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/11159584102.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/28643767815.pdfIn PDF document text
    • http://screen.by/images/file/5183368544.pdfIn PDF document text
    • http://thongthien.vn/upload/files/97176466195.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/10820606895.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/jowisoxenoti.pdfIn PDF document text
    • http://abnicum.com/files/file/tuzokotagoxaxowukekupamu.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/28457110255.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/veduzedunabirekimeze.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/kofugewifewavolofixolelu.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/gakuvelidazivajokufo.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612fafe07fbe8---gavizu.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613402db1f34d---26926360648.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/nifeboropozogofuwixuni.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/kuponitupon.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/xezuwebenurejamazaxugumet.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/15519166672.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/fuvabakulafakabivewibov.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/7707429237.pdfIn PDF document text
    • http://flirdining.com/uploads/files/jugeguxofemonawubotibiruk.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/20210909062428284361.pdfIn PDF document text
    • https://digireg.si/upload/xifopitejupoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=old+version+vidmate+2015PDF 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_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 17364 bytes
SHA-256: d78c5caff67d3f94156bdb260f18249d9f83f91f1668c2d33b4ea151de272c70
font_01_sfnt_off00010251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10251 10928 bytes
SHA-256: 5a755f5a2b9bc584745dd40952e829e72cec2ec9e865edbdc61489f28714a0c2
font_02_sfnt_off00011bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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