Malicious PDF — malware analysis report

Static analysis result for SHA-256 97096282a2689020…

MALICIOUS

PDF

82.0 KB Created: 2021-09-22 18:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b748c5b98c3ddae1917f5720d763acbe SHA-1: 7dd06c1c24ff4a728eb366d6b0b2c6e41ea5d4e5 SHA-256: 97096282a268902060d951e31913d15762bbcbec7221fb26fd371fe9c1444d33
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is a callback phishing lure. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content or solicit sensitive information through a phone call. The presence of numerous links, many on potentially disposable domains, further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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.
  • 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://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e192810ee---42241387438.pdf In PDF document text
    • http://technestudio.eu/userfiles/files/27054013822.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/joziduwubirafedadup.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/82565071008.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210915204627.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/2369712502.pdfIn PDF document text
    • http://riph.pl/userfiles/file/81165681365.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/zilezusolagevezufum.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/rexaviferipigibuleribiv.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/75713623207.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/muved.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/83702008385.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/tapige.pdfIn PDF document text
    • http://temdientu.vn/images/ckeditor/files/xotuxegavipobapi.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/xovijale.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/suwolutajuxijalatamek.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/13180661607.pdfIn PDF document text
    • https://webaprint.be/img/file/89140007630.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/vokelewolixitinijita.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/20826404013.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/xenuzuneloxul.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/63010866281.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/rupesozonunovukoxo.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16149489b08c23---xefevaraxovepixopagiwagi.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/pafibafiga.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/18315971948.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pubg+lite+new+update+2020+apkPDF 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_off0000d522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD522 19944 bytes
SHA-256: f8c6c5ff10f0455ff7822e745d0a52765b2d51203957254ce80dc4e26a90d664
font_01_sfnt_off0001098f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A6 10840 bytes
SHA-256: 3380d1367b5bae45a63781f7a8a355d6ea14f01472e2dda02176109f725ddca9