Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f2ca5c9e6c61f2…

MALICIOUS

PDF

84.5 KB Created: 2021-07-13 11:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1ab77624a62bf331c04e02f18db2f46 SHA-1: cff298de3dd776e913fbdc2a20cf2180160fd6c4 SHA-256: 97f2ca5c9e6c61f2d36b887bb9e04f01ccd60f3abb8802b974f00f9978754a25
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, likely leveraging T1566.001 (Spearphishing Attachment) as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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 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 https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/fb3e3b68b55f152d4ba9ea4d3deb7378/50578433721.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6f32d4a3db832f1bbd75adc47ad9a9d2/tiwaxemoximuzikujitajiv.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/8919877f69d23a37ea1fe1feef8aee13/53087848347.pdf
    • http://daotaonhaccong.com/uploads/userfiles/file/28904102331.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff4544178d---diwuw.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608646b8ae454---39961901700.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbd84de8d6---67742728436.pdf
    • http://tanriovermensucat.com/uploads/genel/files/42879326141.pdf
    • http://cesurmakina.com/userfiles/file/48635965359.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/c5bc1185f44fc55ef9bd4adb220f2c70/logawazusolaju.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824f39c4ec1---rixevalajuvanab.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c530850968---23292573579.pdf
    • https://honda-otolongan.com/upload/files/vudufexelifa.pdf
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/nakamaju.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62988dbf48---gazuxejixonafep.pdf
    • http://wooshin.kr/uploaded/file/83107450160a0b114c8c79.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b496643c16a---96485996104.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b89159a4282---22286797053.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5a22620c9beb01433ccc994d6dc9615/ferenisapefekavez.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97fa0758e7---xideredodazedixinupekot.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/k05a8f7b8peqpd5o7t09l4dlg3/tegerixurizudanorawota.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/17jl7h6eo0dccaop6b8rg3qis3/bokogemamamulutenudari.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+vampire+diaries+free+streaming
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e53e.bin
f228678df26107a1f27f7700057b4c2bdf16dc8cef6f548f18870308c079d4c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 10808 bytes
font_01_sfnt_off0000fdc3.bin
4f3025ff95234c4a1dc91e36b752c352340b02faacf305056933ae2417dc001e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 18228 bytes
font_02_sfnt_off00012cca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCA 16792 bytes