Malicious PDF — malware analysis report

Static analysis result for SHA-256 42804cfbe4fb3c59…

MALICIOUS

PDF

83.8 KB Created: 2021-09-13 19:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8708c3a0c0a5afd2779188b3a5e884bf SHA-1: 8e08ecb552ecfed0387b8db828be390eb83b2120 SHA-256: 42804cfbe4fb3c59ad997d279b0c5cf14416b9b55b3df052b6323adab49429bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating it's designed to execute malicious code or redirect the user to a phishing site. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a number. The ML classifier and ClamAV detection further support its malicious nature, likely as a downloader or part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://raljob.com/userfiles/file/patukewaxim.pdf In PDF document text
    • http://smalternatywa.pl/media/upload/files/ccc4729d3e936735c2e4f3413b6a959d.pdfIn PDF document text
    • http://thaymanhinhlaptop.com/userfiles/file/tejabakemaxepopogukib.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/falunupoxasekaxukodune.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/58597560923.pdfIn PDF document text
    • http://crm333.com/documentos/file/gasowodalaziw.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/41127612435.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/nukipadunakisibinagi.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/sitifexerujuz.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/38264235418.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7798623876.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/fisax.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/98758684938.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fdb091f06---dizejijulama.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/jubonupukufopeji.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210910045524_1654159477.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/2876643022.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/69668685454.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/rifajetuvojapowix.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/fuwabu.pdfIn PDF document text
    • http://boki.hu/editor_up/kexupuluwesu.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161365f00480d5---79410509277.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/91199744860.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/mumiwerezusixivipaduf.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/40300933409.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/50057830640.pdfIn PDF document text
    • https://ibericadearmerias.com/file/darebagitanulitejagesuvaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=phrasal+verbs+list+with+meaning+and+examples+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 18188 bytes
SHA-256: 77560dd0f11c319c6b61a764c89bb0787d52b1e6be80d957bf7086bee98d1bdc
font_02_sfnt_off000127c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C6 11220 bytes
SHA-256: 074fca672e54f4c5e11ecf246f8d522e87d79f15c21d8819c18d1b77e4692ad2

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