Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bd00d21bb613f1…

MALICIOUS

PDF

87.5 KB Created: 2021-09-19 01:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8f01f5f6417bb446d9bdfac5cb3aff15 SHA-1: 22aba48224e0a2376ff4aec38517fe01917d0bba SHA-256: 65bd00d21bb613f18775709b6d5edd71ba43d79dc73563dc1e67b8329bad819c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs that point to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

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
  • 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 https://smidgel.ru/uplcv?utm_term=automatic+call+recorder+iphone PDF link annotation
    • https://eghamatyab.com/basefile/bainbookcom/files/44434716866.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308197c9801---90312718656.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/665d9f7da89a35ed3b99c23dfdfd9aa3/muzowudodinozubufurajidek.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/2038267636.pdfIn PDF document text
    • http://safarang.com/basefile/files/74925503353.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/detagusevedalipe.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/pezusu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/372a4300763a75d49b429bd347f6cdd6/98801460418.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/40806281696.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/33720152402.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/fopiralorapudonufabiz.pdfIn PDF document text
    • http://jpiano.net/userData/ebizro_board/file/89608717293.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/xepenekukifafivuvixasut.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/pikoj.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/87770325214.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/rivulobowovatufimexewex.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/botem.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210913224200.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140d53fd7e89---6758462875.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a02ba8ec10919eb7f2ceacce02d861d5/91136660477.pdfIn PDF document text
    • http://humanlitech.com/files/files/35981402143.pdfIn PDF document text
    • http://ciba.lv/uploaded/file/tebivakajumuzedikopodasal.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/50680800638.pdfIn PDF document text
    • http://gymostrov.eu/gymostrov/userfiles/file/sabanilimuwaxifuwaxupu.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_off0000f212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 17560 bytes
SHA-256: 66a0f9d60788f27cfd35637783365f5c00f29e331b49ef35a346ec0689af6838
font_01_sfnt_off00011fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FE 10692 bytes
SHA-256: 8d88d83ce6af90cbfdd75e20238aad80e778551376c16b66652df2228256137a