Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a6c2e84c79a234…

MALICIOUS

PDF

81.0 KB Created: 2021-03-18 05:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 59cdc8500fea093fa97768f3a9b34dfc SHA-1: f64bfa786862786125396a0989b6933dcacb39f1 SHA-256: 16a6c2e84c79a23465c0e731d4e7359daf67acb385995c62aee399e242e5e44c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://seumenha.ru/wix?keyword=what+does+ben+mean+in+hebrew PDF link annotation
    • http://siwivelijutore.medianewsonline.com/literal_inferential_and_critical_comprehension_reading.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/capital_cities_of_countries.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/74023280255.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/suwokotuzeg.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/zomataxaporejekixajaxam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5827e072-e5d3-488e-a038-f67c4dd8ee63/machine_learning_with_python_ibm_coursera_quiz_answers_week_5.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/76753321416.pdfIn PDF document text
    • http://bupalim.atwebpages.com/13741985325.pdfIn PDF document text
    • http://lugifer.onlinewebshop.net/black_eyed_susans_book.pdfIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_fbf0c9789f89409c85f4b7a985fa4b70.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9209f806-6050-42a6-98b5-cce0f1eb1c1a/buvokijef.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/mobile_device_policy_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/11773789127.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/schedule_template_freepik.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/31437769039.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_4abef1011a9a4b36ba2a146c17e94db2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kaxukok/benim_hocam_tyt_tarih.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d65a7e-c087-4a85-aa0c-6685dbb82fcf/what_period_is_also_known_as_the_age_of_reason.pdfIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_03d4fd56adee4d83bd82072151a9667d.pdf?index=trueIn PDF document text
    • http://sawurawefivovo.myartsonline.com/saxizaxivuve.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_1039139181624e9cb089ee1e26f52afc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09afbafe-ed83-4ce9-b7ca-be47061cf359/kusofedazenosivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4fc99e7-ab08-4671-8d53-39eeb51cc8c7/wimekosefosabim.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_off0000ff46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 5280 bytes
SHA-256: 53cdc41edf64c0faa9aa477adb8b157321c9eb9695ed59411b5b1058e5fb24dd
font_01_sfnt_off0001111f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111F 11016 bytes
SHA-256: e358767e1f465aab71adcd16188190be324e8d662b63f185a896b4c625fec769

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