Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d4abf6d1c8b76e…

MALICIOUS

PDF

73.6 KB Created: 2021-03-21 01:15:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cb37dd805bb6652524e519b9f7113678 SHA-1: 72f09c63331eefa84919188f5cc7de3da0867aaa SHA-256: 34d4abf6d1c8b76efd8570643f9a6d9d7e740ba7d1f4e0a3387d6a380e5cd1bc
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/123?utm_term=uc+browser++jio+phone+mein PDF link annotation
    • http://losadodika.22web.org/galalimivurakaruduzopumij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5ff987173da17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378379/normal_60051492b3875.pdfIn PDF document text
    • http://fexufivuxo.22web.org/sample_middle_school_behavior_plans.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikisomu.epizy.com/5758795204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41160b20-8678-43e3-93ea-5dc16ea8845a/panasonic_phone_set_number_of_rings.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/how_much_does_it_cost_to_fix_a_convection_oven.pdfIn PDF document text
    • http://josapug.epizy.com/thing_explainer_up_goer.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/27750993208.pdfIn PDF document text
    • http://fakefidefunes.rf.gd/61259952599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ab8529-2a37-4efc-aa4d-ae369ffc755f/where_is_the_engine_speed_sensor_located.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e6b3f6-5bce-4057-95c5-164ec1ad65c1/customer_service_representative_job_resume.pdfIn PDF document text
    • http://dekuroveki.rf.gd/california_secretary_of_state_form_llc-_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/avast_cleanup_premium_mod_apk.pdfIn PDF document text
    • http://nusazonawo.epizy.com/digestion_y_absorcion_de_los_lipidos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb73d90-c7d2-45b5-9f6a-82ea3afc86d3/dr_phil_personality_test.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/what_happens_in_a_dark_dark_wood.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/my_husqvarna_backpack_blower_wont_start.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 5228 bytes
SHA-256: 080f76919cf00a9bdfcefc666158606ffc4e2ae8d71b02dee3225ed5b433b77e
font_01_sfnt_off0000f4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A7 10744 bytes
SHA-256: c176de02945d0ca795b56f332d8a88cd3e05f2f69ac1cdf398640eb63ca571fa

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