Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f3ab74bfe7cd01…

MALICIOUS

PDF

82.0 KB Created: 2021-09-21 22:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ccf69a5da08411f4a7fbc2880b6325f SHA-1: 4fc423f4d70c1df64ddbeab32c3cf3490b6f6423 SHA-256: a3f3ab74bfe7cd0177a1dc07482f09d7392c3371066b5bbdd74a4f4ece1414b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.
  • 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://laborke.ru/uplcv?utm_term=word+shatter+app PDF link annotation
    • https://bulendengin.com/upload/ckfinder/files/72804419569.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/minuxetisakisimoril.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/fomodenola.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/kamebalidunuvulame.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/xajefakogawo.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/72615899977.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/63274236165.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-10/20210910195832144497.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/8052518656.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/55922053784.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/pupizategevutalevufunozi.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/56548333481.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/kigasavumitukesezuw.pdfIn PDF document text
    • http://baovethanglongmb.com/upload/files/rutelugit.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/89406925041.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/mabozawizexa.pdfIn PDF document text
    • http://free-note.kr/files/fckeditor/file/19494167706133d2b534b91.pdfIn PDF document text
    • http://getvisa.ru/images/File/selapusifinizejuvitov.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/62537426211.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/zijitadixizaxel.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/bogeguxexetawibubago.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/fekorelujofikikodawamego.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/vopirup.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/povonoz.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_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 10240 bytes
SHA-256: e6052a0ce70f9b84381b068a53e8d90bff36060c48b9165cc3c09ff382bfed04
font_01_sfnt_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 18760 bytes
SHA-256: eb56b5b8b2cd45867bd4d0231f888f78dbd41352a032afa1998afb04fd80f91e
font_02_sfnt_off000122ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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