Malicious PDF — malware analysis report

Static analysis result for SHA-256 b674428c48d5ed0a…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 01:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 390d750f4109260271767681154d3e8b SHA-1: 5a8ccd52f0e96834213453a6ce424ed426fb8a2a SHA-256: b674428c48d5ed0a1f6bcfd012eead58e4157ab5a1a56718de9aedd17e981e24
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic specifically indicates a callback phishing or tech-support scam pattern. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving social engineering to trick the user into initiating contact.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/wix?keyword=union+city+baseball+academy PDF link annotation
    • https://benixufo.weebly.com/uploads/1/3/4/6/134660079/a5d8bf9a5e.pdfIn PDF document text
    • https://kogababofaf.weebly.com/uploads/1/3/0/9/130969162/a9ef09a062.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/Wibjehb/25147617273.pdfIn PDF document text
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/zisez_pewufalilebu.pdfIn PDF document text
    • http://i-men.ru/simple_cast_softwaretpiuq.pdfIn PDF document text
    • http://merishwheelrecords.com/gowajakukizepujorqhx0.pdfIn PDF document text
    • https://pesopipuni.weebly.com/uploads/1/3/2/3/132303043/jezop.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/ggjjgOp/dumebotipukazaviniradixa.pdfIn PDF document text
    • http://meriline.store/bizovaparakusofiminap2uus.pdfIn PDF document text
    • http://biggymstoe.com/java_8_download_64-bit_windowsutcte.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/jopigepikok_pexudimus_sekam_magubid.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/ibJZigC/62748188319.pdfIn PDF document text
    • https://bafosuronam.weebly.com/uploads/1/3/0/7/130738527/b55b1849b3.pdfIn PDF document text
    • http://nashremont.site/mi_planta_de_naranja_lima_resumen_del_capitulo_2mlyjd.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/geVhclD/homeschool_activities_in_charlotte_nc.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/rafazejowej_didesopabake_kebajot.pdfIn PDF document text
    • https://nomikevokatipo.weebly.com/uploads/1/3/1/8/131859895/7363500.pdfIn PDF document text
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/2549360.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nawuvud/aspectj._jar_java2s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2070e922-ac6f-43ce-b8ee-d20741abfba7/the_birds_daphne_du_maurier.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/53407784209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41698441-da31-4fed-b0d4-8ca7fcb6423c/what_does_symbol_mean_in_algebra.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/ldaptemplate_search_example_spring_boot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8496c806-47da-4963-b9cc-f6bd599dadcd/33632217402.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/23726118000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a6d828-1714-4af3-82ac-4c1824297b4c/1938953583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e165956-a988-44fe-a64f-16cc752703e7/zipupalalenumofo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA1 5012 bytes
SHA-256: 249404b50a76477b9f4df3875205eecaa5294850baafcbd8852b9b7ca06fec39
font_01_sfnt_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 11132 bytes
SHA-256: e9ecb39e2fbdbd7f9fcd986e413b7a4283c1a24aca10a21a9e46bb50867bcd1a
font_02_sfnt_off0001138f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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