Malicious PDF — malware analysis report

Static analysis result for SHA-256 932ab70d70510dae…

MALICIOUS

PDF

86.3 KB Created: 2021-06-27 12:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: fae24746979cec11b7873b25afff153d SHA-1: 9d6fac09e56b0f5f9b521f7d039e6dbeec0392df SHA-256: 932ab70d70510daec8b7a4e14baecb6b60c73be1ea1686f4c7d967c495e74440
156 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and link farm heuristics, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple links on disposable hosting and compromised CMS uploads further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://queure.ru/uplcv?utm_term=captain+america+the+first+avenger+movie+download+in+telugu PDF link annotation
    • http://berbun.com/user_img/file/67952325258.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/76550872351.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/orkp14u5kk8vp5obifb54ueude/93912149334.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/3rbvj2ce0a7in08umpsn9jq790/65286464761.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/12886790591.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/zidofutefokuxaxekenapavum.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/5fc2f3add8527fc85bd1a31cb83815a0/bodufewopukenev.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/r104o67j2i6oc6939a9vrnsuu3/jubovokawufazakiwujuvir.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/valulakixexe.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/iemjq80clsdlpshf27o72o08db/63223620564.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/la97no7tb9kvf14pq1n6i5s8e0/folonazoxikodemigagonuw.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210621051411.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/nabozuti.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16093502fae748---87496078404.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cefd9ad504d---namafavajitizaze.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/1esqhr1u3d2v6ne8uilp43qgu2/74870320802.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/xabumepunukunoxaloto.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ce643f767---75753929738.pdfIn PDF document text
    • http://mextro.de/upload/files/govarodiselevozufo.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8c081c9dc---89310378537.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/jasaloduvivarejetipen.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609969f88db32---70281715373.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/t7ndbedsqj0iphf7i9q8ue0ljp/tatopawasotawetavirutu.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_off0000edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 16600 bytes
SHA-256: b8b65250315e3eaecd33e6707e96d8506500c082d67229d8131beead49855d9e
font_01_sfnt_off000118de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DE 11352 bytes
SHA-256: 075ad8697f376d53dff79878d650758317505de47d7b1679114ce805e230e053
font_02_sfnt_off00013347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13347 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1