Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f50a495202b0614…

MALICIOUS

PDF

80.1 KB Created: 2021-06-04 08:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 847ea6958856699b3dd1fbf829f1cebb SHA-1: 3e5e1a192105e3ec00f349c7e7f139dac6afe429 SHA-256: 2f50a495202b0614bf8136e84fc2f15aad4ae98057f902c5f6c77017b5b5fd9d
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, a common tactic for tech support scams or phishing. The presence of numerous external links, many hosted on disposable domains, further supports a malicious link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://laborke.ru/pbw?utm_term=how+to+make+wireless+charger+work+in+gmc+yukon PDF link annotation
    • https://vevumugenewasu.weebly.com/uploads/1/3/0/7/130776279/kagumugevigu.pdfIn PDF document text
    • https://lanowixel.weebly.com/uploads/1/3/4/8/134862970/00c9c2dc2b3f0.pdfIn PDF document text
    • https://zebonusifok.weebly.com/uploads/1/3/4/5/134509505/7a44f21d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_60014e05b43c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_60171d86e51fc.pdfIn PDF document text
    • https://jalagowozitaj.weebly.com/uploads/1/3/5/9/135967583/fusekomeso_pedun_vupiwudave.pdfIn PDF document text
    • https://judumufef.weebly.com/uploads/1/3/0/7/130738812/c77beb4930.pdfIn PDF document text
    • https://rezepurobej.weebly.com/uploads/1/3/5/3/135327696/49a662da45a033d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460677/normal_5febbf9983129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_603e70905a48d.pdfIn PDF document text
    • https://garowowo.weebly.com/uploads/1/3/6/0/136033653/4b605275c40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_602f9fd3d9b81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b5797b-58c9-4f06-b1c8-afb088c8769c/how_do_i_set_the_time_on_a_marathon_wr50m_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d43f911-8c1d-4804-9197-85777437bc0a/44831483647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ffb56a4-5c8d-420b-b1c6-39539cf3e73f/victoria_university_melbourne_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721a0cc2-9668-40d8-81a1-8ef7907fe51d/pricerunner_fluke_175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411a8f6e-f44a-4d71-ae5b-cd4b291ef944/ipad_mini_2_size_inches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70de5f2-a6b3-4033-9a57-7283ee67b1b3/39154467521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6ffb66-e106-490a-9e3c-24fb7b98f931/tissot_1853_chemin_des_tourelles_powermatic_80_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c786ca29-d7a1-4f24-ad56-0fc47b3e94ae/watch_salems_lot_2004_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7e649f-6a33-41f8-932c-e7e5d7c87cf3/tunovij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764756e0-c7de-4d71-9c4d-36c5ac8daa14/sijixovowanuvibafeda.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://scripts.sil.org/OFLIn 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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 5432 bytes
SHA-256: 24ffe964f03086be5a3b3d13a425f93ecf837fa340ffa06ea671ac46e8d51b17
font_01_sfnt_off0000f574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 11632 bytes
SHA-256: bf2e1b4eebd744d5d40d4ef28b02c78431cbf8c47b0dbc69b58a14bc58c64171
font_02_sfnt_off00011d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0F 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15