Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fe30c33f31fd36…

MALICIOUS

PDF

72.6 KB Created: 2021-10-02 18:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d10a3d69eb99041001a4c37aa1fb1bb4 SHA-1: 8184446d523a4af935336e3e3bbc576ae143b86d SHA-256: 97fe30c33f31fd36604072a86581d60ce1c9f1f5dfb3bb9d160058a09e59bf75
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, designed to redirect users to potentially harmful content. The primary attack pattern involves luring users through these links, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://aviteksural.ru/admin/ckfinder/userfiles/files/7267790119.pdf In PDF document text
    • http://goodlack.cz/userfiles/file/vewasofe.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613956dc0edff---vitakefux.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/51511741731.pdfIn PDF document text
    • http://4darchitecture.org/img/all/73552703427.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/xufupuduxaporuf.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/pukuvevisetoxafebomem.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/88753327181.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/8965808392.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615307057013a---rubumiwawaniriw.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/xokukixumofoviviforof.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/laxeduj.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/53209118887.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/98480920266.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/gapifemeviwugevusatekewo.pdfIn PDF document text
    • https://akconta.com/uploads/files/27784395797.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/57315737917.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/pujopiniwagejijo.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/dakubifimezudedizabe.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/59238107395.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141674e63307---mutapelemotetuko.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/woxufaji.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e1f354f3f0---lilovaxetilew.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/63277003341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+change+owner+on+chromebook+without+passwordPDF 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_off0000b56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56C 17348 bytes
SHA-256: bbfba8b7b229ab5025b58fe87171b599225ffdf3cb7a6bd21fae8abb553498bd
font_01_sfnt_off0000e208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 11324 bytes
SHA-256: 44676929ee31b88ab75754c4ffb9f6bad137678ce396c49799bd314bf1dd0af6