Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c7625eca611418…

MALICIOUS

PDF

87.8 KB Created: 2021-09-18 21:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c955a655a3aeb04f8607c86493774d97 SHA-1: b68e5f9e61ac00d8ed9f7dbcc4275ecc606d0114 SHA-256: 94c7625eca611418626ac9768c9ac81e56a75d960683c278bd2826ad5595d9ac
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests a phishing or redirection attempt. The 'Urgency / deadline lure' heuristic further supports the phishing pretext, aiming to prompt immediate user action.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nordavril.com/userfiles/file/66754848358.pdf In PDF document text
    • http://bimbrlata.cz/UserFiles/File/dawuvonijuzudif.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/14959542227.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145dfc02f077---xomaliretepodanudutu.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/16674432394.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/74558167359.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/kedinodanosun.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210911062904.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/88098866982.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/12324085486.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/bilebanunokisedonedebus.pdfIn PDF document text
    • https://codecs.ro/images/file/82861860512.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/dibedufiral.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/54524277132.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/31180338470.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/jegareparutivik.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/boxubejuri.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/60458692609.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/16825753386134777f1b127.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/79579357422.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/xejezawaforogepukaromas.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/jalewavifusabowebamabuz.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/c3abb9936edc313699994f1347ae479c/45289436870.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/fafozorowasufinure.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=skymovies+south+720p+mkvPDF 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_off0000f167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 10844 bytes
SHA-256: cb46a6581dbed35119fc22a139ab03f2383db1c82d41e721f79915ce79dbe8ee
font_01_sfnt_off00010a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9A 17800 bytes
SHA-256: c4250532f90ec6b28b6c723a0d68343cb6a6661d470bad8262faeea1beb3af39
font_02_sfnt_off00013886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13886 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1