Malicious PDF — malware analysis report

Static analysis result for SHA-256 19773666bd0c8b52…

MALICIOUS

PDF

81.6 KB Created: 2021-04-02 09:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b90eebf2d9fff7f2d7cdcedb51794242 SHA-1: c6f606f518e35ff43fdb5c78296ea41275e5c295 SHA-256: 19773666bd0c8b52db55948d4106a7d89d0cde6e08a716abcf041bfc8c5e4cf3
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9990

Heuristics 4

  • 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://jottigo.ru/123?utm_term=python+3.+0+cheat+sheet PDF link annotation
    • http://rudotera.22web.org/how_many_calories_are_in_a_bacon_egg_and_cheese_sandwich_on_a_roll.pdfIn PDF document text
    • http://rusherx.studio/cnn_news_today_live_streamingckiv2.pdfIn PDF document text
    • https://wudonazig.weebly.com/uploads/1/3/4/6/134675044/99e9864a1.pdfIn PDF document text
    • http://pexulabin.iblogger.org/nuberupam.pdfIn PDF document text
    • http://dixutimar.iblogger.org/53061715396.pdfIn PDF document text
    • http://laxelenokuro.22web.org/best_3d_animator_app_for_android.pdfIn PDF document text
    • https://xegezutiraviral.weebly.com/uploads/1/3/0/7/130775125/dijozozagekozifozi.pdfIn PDF document text
    • http://sorebifisawug.22web.org/judunofemezufo.pdfIn PDF document text
    • http://evakuator-uga.ru/automating_excel_sheetsm1kt9.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/wuvetilopivuz.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/gadoguse-zijule-jinipowuket-rixexozoris.pdfIn PDF document text
    • http://kismyketio.com/44256149287mmxn2.pdfIn PDF document text
    • http://wesabelilunu.22web.org/xigofet.pdfIn PDF document text
    • https://cheatography.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/after_book_parents_guide.pdfIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_e92bcdccd3d146c3a4bffb0aadd22b3f.pdf?index=trueIn PDF document text
    • http://wapudajikipidem.epizy.com/dell_latitude_e7450_wifi_driver_for_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/at_t_tv_channel_guide_chicago.pdfIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_9a96907168424b21b398f7556db97cd5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/fintech_indonesia_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/app_inventor_2_source.pdfIn PDF document text
    • http://jirizaxewusi.epizy.com/vedic_astrology_books_online_free.pdfIn PDF document text
    • http://vigukesege.epizy.com/laduwofokadoridefupi.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_7ebd0ad949be4583897515512d7d5b92.pdf?index=trueIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_6fd0c676a97547cabb41f39df413e6dd.pdf?index=trueIn PDF document text
    • http://fozugafunu.epizy.com/veterinary_virology_mcqs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE852 5200 bytes
SHA-256: aa81cbdd287302ec86b1d159c770c0c02f34eae3f06088aa33278e64f74631a0
font_01_sfnt_off0000fa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA16 12192 bytes
SHA-256: 9789c7e9850ecb19c09aa23d945976f4ed487b94d9be95215add19996c5c830a
font_02_sfnt_off00012418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12418 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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