Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ed658a8433f5ec…

MALICIOUS

PDF

93.6 KB Created: 2021-06-12 15:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58292a41be3fdf816edbdb697ff23577 SHA-1: 3979d871d7ac9348545ed137958ae95be11a609b SHA-256: d3ed658a8433f5ec38b2c497ec6ca232b440981eaae1d7ed34965ef580afb4d9
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-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://infrive.ru/pbw?utm_term=resto+druid+talents+wotlk PDF link annotation
    • https://garaxawodipadi.weebly.com/uploads/1/3/4/5/134595678/vevufedobob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_603f9fd2bfdf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379606/normal_5ffb6abceec76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5ffdf0d275315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457330/normal_5fd1bc75e89fc.pdfIn PDF document text
    • https://zurufapejol.weebly.com/uploads/1/3/0/7/130739524/5e78ac665994ae5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gutopevif.pbworks.com/f/management_consulting_market_analysis.pdfIn PDF document text
    • http://bowawesup.pbworks.com/w/file/fetch/144540006/7813513812.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/w/file/fetch/144422952/connect_outlook_2013_to_yahoo_mail.pdfIn PDF document text
    • http://wisarazed.pbworks.com/w/file/fetch/144466539/can_you_retrieve_deleted_whatsapp_messages_from_icloud.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/w/file/fetch/144957777/weridesemi.pdfIn PDF document text
    • http://gitefov.pbworks.com/f/song_hamnava_mere.pdfIn PDF document text
    • http://nudifimixonu.pbworks.com/w/file/fetch/145131939/depilamasi.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144432978/93435843297.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/f/tamaliwonerebir.pdfIn PDF document text
    • http://kopixikosibi.pbworks.com/f/divip.pdfIn PDF document text
    • http://xetibubib.pbworks.com/w/file/fetch/144418668/what_is_the_composition_of_olive_oil.pdfIn PDF document text
    • http://zafasuvolo.pbworks.com/w/file/fetch/144623748/fudozuzatuzevinepesoto.pdfIn PDF document text
    • http://goxuluk.pbworks.com/f/subject_and_object_pronouns_test.pdfIn PDF document text
    • http://jowenoxo.pbworks.com/f/54121665659.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/145090026/kill_order_movie_maze_runner.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144419820/majusiregutifetipu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013725.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13725 27656 bytes
SHA-256: ab14eb5360c4f0b984f03c6ca981cf9af2479eae3e578a942256f94148df61fc
font_00_sfnt_off000103fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 4980 bytes
SHA-256: 5cfd02740134aa41ee6896787d07e3b55358e68146114cd2c26d5f9f943b5d8a
font_01_sfnt_off00011513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11513 9888 bytes
SHA-256: 1e7a2c7f1560215179c8ccaccaf8f562ef0625db7b7876bdabf55a7be300037f

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