Malicious PDF — malware analysis report

Static analysis result for SHA-256 e876b863d0c05d96…

MALICIOUS

PDF

78.5 KB Created: 2021-03-22 22:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 57648c05f742f69df72b8cf181cd901d SHA-1: a41d67b9eac325d29cb00d2bfc1854a5a0642af1 SHA-256: e876b863d0c05d966b110938b75069fd2656c0ae8c258a11d9a773a025c75236
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/wix?keyword=sunnyside+high+school+tucson PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421474/normal_6004ac6e97f84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_6046858bedadb.pdfIn PDF document text
    • https://lurofigugibax.weebly.com/uploads/1/3/4/6/134686006/pugavus_jarazitewax_dolewa.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/ralavawagovefexa.pdfIn PDF document text
    • http://nepifumawal.22web.org/aptoide_gratuit_pour_android.pdfIn PDF document text
    • http://prizinsta24.online/97769933022wzose.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/titedugezekifev-mujadaberurup-dovagel-ledepokuxe.pdfIn PDF document text
    • http://pefujogori.iblogger.org/beko_frost_free_fridge_freezer_instruction_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fcdf075e842b.pdfIn PDF document text
    • http://normal-id.com/whistler_cr85_radar_detector_reviews3sfdv.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/414038.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
    • http://sajokibor.epizy.com/28890792046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b2cf44-9630-4c02-8ebb-a838a692dd9d/50408054294.pdfIn PDF document text
    • http://suwetiwojiza.rf.gd/dimes.pdfIn PDF document text
    • http://piwisivajefi.rf.gd/94359430343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4cd2292-a2e3-43a6-8f90-b585e115a492/compare_and_contrast_essay_topics_for_elementary_students.pdfIn PDF document text
    • http://judinola.epizy.com/how_to_make_a_book_into_a_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbd8212-0ec8-445a-95cc-afd60f4f737c/define_programmed_instruction_learning.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_off0000e93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 4984 bytes
SHA-256: 5871cf74613cba347864508a796b2e59b3dc58d73c8ad71cd4c0b1da5ff1e7d9
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 10804 bytes
SHA-256: 1d6776801abb1b0b7d3e15b721492ffd9954c8b96d199cd5383797e4f811497b
font_02_sfnt_off00011ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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