Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be0118ed2bd299d…

MALICIOUS

PDF

94.1 KB Created: 2021-08-06 19:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b3f521bdbdb6c8663f202b0015c8881c SHA-1: c1d571d3c040eac847aa47cd8c2422d381806625 SHA-256: 9be0118ed2bd299d4c6f06a29bab747c0c19f126b59aa48145dab50cb54bf346
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the link farm pattern are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c992ac741be---fasuvekavibezoxukewu.pdf In PDF document text
    • https://ikitellirezistans.com/upload/files/99624053620.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/sefatexafutuw.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/bamujetegepa.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/gopuligumomibimud.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c82cb46db---70335624240.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cde80a5834---ladafonibidutudixusomiju.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/fuxajukug.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b575189f9f9---webegunezuwogarefugov.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/8319965276.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/43086518525.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/kusejafufasupediwi.pdfIn PDF document text
    • https://ecoretras.com/file/8614365369.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/32f9d01276e327c0aeca163132246005/pogemimabedopadatup.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9e2468a17819a285e023fd2264c73460/lunafarebekovakew.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c494f42b6a---1487227098.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/jasiwixegafamat.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/fewimomawidavenefi.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40f25e07dc---mokurubokip.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/gapujazebuz.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/12958511526.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/kakulizijuturuwumasararen.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/11274433887.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/85931319162.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+resign+as+deped+teacherPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 17008 bytes
SHA-256: 539844d1e53c723598b858666e23b6fde8a322b409228c3c24aff1cce4fe1861
font_01_sfnt_off000122ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B00 16088 bytes
SHA-256: 0e3d63f173342003c62a86c726d4d5a85e7f52d44cf06618766a4fa08a0866bf
font_03_sfnt_off00015034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15034 10824 bytes
SHA-256: 56edf5373c987e55cf23c349b0e5591f831e7e1100ff5f70eeb87f7acb5be320

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