Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cbc4022a17af76…

MALICIOUS

PDF

100.8 KB Created: 2021-06-13 23:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 411102bd15f26be97ccf4b1e7a9b773a SHA-1: 702ab23433b7bfbb449322b6c7a3b577bb7e3bbf SHA-256: 30cbc4022a17af764fe9f3809066eb4b941d3fa565601f08b7691a327ce09eb0
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 0.9997

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://philabc.ru/pbw?utm_term=the+avr+microcontroller+and+embedded+systems+using+assembly+and+c+solution+manual PDF link annotation
    • https://xoxizanelanoruf.weebly.com/uploads/1/3/0/7/130740612/boxerativuw-taburamawuze-resuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_605f7ab861e63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_602bdcf1d7895.pdfIn PDF document text
    • https://dosogomufafana.weebly.com/uploads/1/3/2/6/132696174/rufewawofe.pdfIn PDF document text
    • https://fidedelab.weebly.com/uploads/1/3/4/0/134096197/1871139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419832/normal_5fc8660029110.pdfIn PDF document text
    • https://tozubovudifudi.weebly.com/uploads/1/3/5/9/135973827/7128097.pdfIn PDF document text
    • https://verafilutawus.weebly.com/uploads/1/3/4/5/134597792/bfb6e1.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://negaboxa.pbworks.com/f/how_to_download_tlauncher_on_a_school_chromebook.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/w/file/fetch/144657597/ha_hasi_ban_gaye_female_whatsapp_status_video_download.pdfIn PDF document text
    • http://wenumizelug.pbworks.com/w/file/fetch/145018944/watch_shes_the_one_filipino_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2ad423-d95e-4f99-9bb2-dbbd35f8beff/23924779482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64c7188-2263-45b3-97a5-580e7d0ba1c3/kevozevevupabumumadebupub.pdfIn PDF document text
    • http://kiletejude.pbworks.com/f/97451778489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a22419f-d180-4fe2-a9aa-6d81cca6542f/kejirewa.pdfIn PDF document text
    • http://rixepal.pbworks.com/f/55746983432.pdfIn PDF document text
    • http://ritijix.pbworks.com/w/file/fetch/144530046/fast_and_furious_9_full_movie_free_download_mp4_english.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144640038/tell_me_about_yourself_interview_question_example.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D88 5484 bytes
SHA-256: f0af1e5ff107bd13e42e2c6798d9d86c5b4a1c6222235e4273c748fc8c3d097d
font_01_sfnt_off0001400e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400E 11800 bytes
SHA-256: e5cd24a77bcd5294652e84c2c486888c8643e1119114a0b3bdaa6b529629ff90
font_02_sfnt_off0001687d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1687D 16184 bytes
SHA-256: 217e0707128e576d2f749182c086f987f2cf1cbd32dfc2fa9554e5b93bee3344
font_03_sfnt_off00017d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D9E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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