Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de1c9954e162fad…

MALICIOUS

PDF

85.0 KB Created: 2021-03-14 15:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f2f6036509bb9e0731cd209737d4bddb SHA-1: 887625510f1daeffcc0dae5209a495a4f9ad464a SHA-256: 1de1c9954e162fad9b16369df2dfadf33e4b9a7d1e0084a915f5158bf0de1e29
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO abuse tactic. The embedded document body text is heavily obfuscated and appears to be junk data, but the presence of numerous external links points towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=woke+a+guide+to+social+justice+pdf+download PDF link annotation
    • http://fevofawemuwa.medianewsonline.com/grade_12_technical_drawing_textbook.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/pdf_book_maker_apk.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/lomelosoxuwufizeduwim.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/bohemian_rhapsody_guitar_solo.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/adjectives_and_adverbs_grammar_explanation.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/adobe_reader_2020_free_download.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/mackie_cr1604_manual.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://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_4ae2583ab85744139941a0fa800ed6fb.pdf?index=trueIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_b357dea20199420fac2f605369e32221.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_361f3099a5344dc489471ef8477f53a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a07617e-a5d3-43e0-80a5-e5672cf49142/fasisekuwanipojadaxixode.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/dafegagut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0502bdbc-342b-4c17-a06c-39b4ee3a1333/my_samsung_washer_keeps_going_off_balance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9d37f9-902a-471d-bbb6-76a78a719776/88765397811.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_9050430a645b465cb6eef48641d3788d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d0fe8e-ee19-4e14-9e7f-d0338443a6c4/functional_strength_exercises_for_older_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/zonir.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/what_is_dash_diet_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/62104978409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0701dcd-dc4f-4251-9d39-53fc32e8b31a/xirunajewuzesolodona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73608fcb-1e4b-473e-be8a-32312e776ffd/hp_officejet_7110_printer_cartridges.pdfIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_811c7a7c8721483fa253dac88d26791f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f035dc5f-54bc-4cd5-9966-071760803481/are_portable_air_conditioners_less_efficient_than_window_units.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/539036b3-293d-4d76-b3f0-96b6adf8a3ad/zunukanifijet.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/21422429668.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_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 5356 bytes
SHA-256: dad994a08fb80f0099400e5c0fbcb5480808a6fa9205aaf5dc1cb22ca433dd0c
font_01_sfnt_off000110ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FF 11812 bytes
SHA-256: 496889b211873e7c462aa06825fa180458defb6adf4523e2fa0a8bfb1d673d8a
font_02_sfnt_off000137f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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