Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02ed53faed59543…

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 08:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 768450b306f7a646d3d6fc976d686c69 SHA-1: 62fe303801f32d5fed6c6551999c13babaf7c8be SHA-256: a02ed53faed59543a7fd787404ea91776147336a45a819586e3868cae4a53646
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic for phishing or malware distribution. It contains numerous external URIs, including one pointing to 'allytemp.ru', suggesting it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://allytemp.ru/uplcv?utm_term=watch+new+tamil+movies+free PDF link annotation
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/i25hu0endlf9kujne0f9qbg9j0/20498319276.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/22656845793.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/jugekaxewoluxivo.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/dukigusedapuwogelim.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/voxival.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16138bf87b8cbe---fazavewewenawi.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/81419613510.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/bojazemo.pdfIn PDF document text
    • http://dejede.com/userfiles/file/livaweriwiwuzenufal.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/19469439359.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/56338143300.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/retasadebinigezinovozi.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/51875444714.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/95967140603.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/jobamikatimenepamitat.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/27978026869.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/20656155554.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/72774308067.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210907025546.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/47798181336.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/42473252401.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/silutopedufarofinuj.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/fenimub.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/pirisolaxedukavumabod.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3664292354.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_off0000b2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE1 14320 bytes
SHA-256: 9a73e67f491e237043449a63e600dfaf74ce17b924c9e872481c56dc7f01cea5
font_02_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 10748 bytes
SHA-256: c7fd3995dacec2e39c0dfad8c0815c9fa7c39948cf10a64e21ede98f73ba96bb