Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f827f425d6d1d6f…

MALICIOUS

PDF

90.3 KB Created: 2021-03-04 01:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1740d9ee68e71e3a64235efdf08e37c2 SHA-1: 4596df5b8a8c2598c4063dc022ee449f0a9b7f38 SHA-256: 0f827f425d6d1d6fa327f53ebc86db78a54b2f8c821da06eea9b83c09ccfad2a
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to 'aviation tech school near me', likely a lure to attract victims. No scripts were extracted, but the presence of multiple malicious URLs points to a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=aviation+tech+school+near+me PDF link annotation
    • https://kapojisu.weebly.com/uploads/1/3/2/6/132696117/df9002bfa010.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/laladezedabhonn1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5fffcca76e35a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_60400446b4211.pdfIn PDF document text
    • http://instapriz.online/digexowelasapigilekuvb073.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/ef3493e116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_5fe6ba39288bf.pdfIn PDF document text
    • http://pro-konditer.com/s10_v8_conversion_partsts81y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_603e1a1708c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_603bfe61e6d33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371787/normal_60043e2ae12d3.pdfIn PDF document text
    • http://edapog.online/aashiqui_2_picture_video_song8qybd.pdfIn PDF document text
    • https://zevugakarexavak.weebly.com/uploads/1/3/1/8/131857252/tuxasobate-lusavasuwidep.pdfIn PDF document text
    • http://myfavoritesun.xyz/microsoft_powerpoint_template69j3n.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://wugujub.onlinewebshop.net/imac_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/app_store_review_guidelines_history.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/rasewosuku.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_off000117a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 4876 bytes
SHA-256: 662025203a60c0ad15c77dab68b09edd45a4b567e014363286f8c465341ef176
font_01_sfnt_off000127f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F9 11096 bytes
SHA-256: 7bd8b9de4c92515ef1b044da94f23a5f199aecc0226d11d4bc1f69eeddcf51e7
font_02_sfnt_off00014db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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