Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92531168bc0ee9f…

MALICIOUS

PDF

87.6 KB Created: 2021-07-03 03:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa7bc44380303413126535b25894e316 SHA-1: 2eecbb2b66ca3dd58c6790a5e4c5128b1ac30e27 SHA-256: e92531168bc0ee9f7a6fbfc60fa4a608918db3c29c4528e062c34d832d99f7e1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing campaign. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to distribute further malicious content. The presence of external URIs and the PDF_RANDOM_URL_LINK heuristic indicate an attempt to redirect users to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/21ec0c7274cdbbcdd82c3f29d65bebb2/50743633968.pdf In PDF document text
    • http://tryinvest.eu/userfiles/files/8327866017.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/50qjltl1ducp6hkqlktec0aml4/vexijifaseniv.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d60f7691d1---90464651669.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/62cb7f32f0ba5c04222de423ee4272a7/lalugovo.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/59a0e2c9628c0c15974d80225e937c77/41820784407.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0cf3bbfd8---5617013620.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/27671358622.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608194205ca97---zusinupixofidofolorobi.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/10728021509.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/sufopezuxonago.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7b16370db---goruzefudesarixozopavis.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160917daf0e765---dadubigin.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ucdeerb2bub1tddc0turkru113/seziduxabenoxavotizurome.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/1c708pqpu927f74foo76qe4v55/vuvowonopetinas.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/dqmt9q3adhqbd99ngug7lkl3df/48267429451.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/22s6cbvaqvih2lnb2ie8jurk21/56083121398.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210626200514_jnre4h.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c81f728dd6---98138903161.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/59ad80283c20ef7604661318a64c0e24/lakidepupexewinuruziwowan.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/mapasanininoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=love+in+the+time+of+cholera+free+pdfPDF 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_off0000f3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B0 10740 bytes
SHA-256: 89bf3e9083a3309b2135413c98cc3cfd634c68169073b5bf6db5993905caa06c
font_01_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 17136 bytes
SHA-256: 95f5344a5af8868c4572f58831611cc785edfc89272c678a0a67d2f787ee7ed4
font_02_sfnt_off0001390e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.