Malicious PDF — malware analysis report

Static analysis result for SHA-256 da16a3ec6a5468a9…

MALICIOUS

PDF

77.5 KB Created: 2021-03-04 00:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1548cf8d73deaaa181dd74a84265ffb0 SHA-1: 2f1c85152ed2b1e573286436f2608c33a63540b2 SHA-256: da16a3ec6a5468a922b881b88a07e4da0a339bb7511c1a19c43a7dc54427116f
134 Risk Score

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. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/123?utm_term=how+to+reboot+my+cox+cable+box PDF link annotation
    • https://cdn.sqhk.co/fijajiles/iigghdU/99363722570.pdfIn PDF document text
    • http://mebel-albero.ru/the_hula_hoopin_queen_worksheetsja7zb.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/Cibjbgg/35576062393.pdfIn PDF document text
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/sidowonini-kufadezux-jugubixen-wuburukorurunab.pdfIn PDF document text
    • http://craftsmansmetics.com/call_block_app_for_android_freealsn3.pdfIn PDF document text
    • https://wuvonedegodufez.weebly.com/uploads/1/3/4/8/134883317/1370933.pdfIn PDF document text
    • http://mmamba.ru/mivanizitiphj8j.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/7bDiaUi/xozam.pdfIn PDF document text
    • http://chambreop.xyz/somewhere_over_the_rainbow_sheet_music_free_piano_easye4g81.pdfIn PDF document text
    • https://bapumora.weebly.com/uploads/1/3/2/7/132740837/2128629.pdfIn PDF document text
    • http://agencymedia-ig.com/98147945505rpcg4.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/04gdiaj/evolutionary_approach_criticism.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/qjijgSv/speedometer_not_working_and_transmission_not_shifting.pdfIn PDF document text
    • http://prostochillforum.fun/ielts_reading_practice_test_20196qul7.pdfIn PDF document text
    • https://cdn.sqhk.co/zisazege/oqNjeha/faxebab.pdfIn PDF document text
    • http://tufataf.22web.org/applied_building_information_modelling_and_management.pdfIn PDF document text
    • http://lovemecompletely.com/32142956683czft1.pdfIn PDF document text
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/famukalu.pdfIn PDF document text
    • http://onlinetiser.website/learn_python_programming_freea1aor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilevatawew.epizy.com/socomec_atys_3e_manual.pdfIn PDF document text
    • http://vegawududabuz.rf.gd/70793443231.pdfIn PDF document text
    • http://fajamoluw.epizy.com/arduino_uno_starter_kit_price.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 5128 bytes
SHA-256: 1a7406d113ed4ee63ec07b06dca7b488bc26b2a464ec2250b2c37bc1910f1f0e
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 10976 bytes
SHA-256: e630201ae16ce17b8a1d99cb169f7d2adc790beec234d35f3e30f0347aa0edd7

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