Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87d65aae3fabe50…

MALICIOUS

PDF

82.3 KB Created: 2021-04-05 00:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 47c62ca14061b0ae41e6f4539e9e9e86 SHA-1: 5408f077b41c2bea4c1542bfdc571220a06bc157 SHA-256: f87d65aae3fabe50e82e80793fea24479d7cc38d62ae8e91ae273a19c79a2afb
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 0.9967

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://jumiwimov.ru/wix?keyword=general+chemistry+temperature+and+density+worksheet+%25231 PDF link annotation
    • https://cdn.sqhk.co/bepeguvovori/jeymE4H/31922046438.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/45918565429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_605f95f957417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456982/normal_5ff4ca677795c.pdfIn PDF document text
    • http://vengriya.space/how_to_test_a_diesel_fuel_pumpxej38.pdfIn PDF document text
    • http://azakalaza5.xyz/28130924532f4fr2.pdfIn PDF document text
    • http://xebupado.mypressonline.com/why_does_my_lg_top_loading_washing_machine_smell.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387589/normal_5ff63a18399d8.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/aLghnhb/29715572274.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/8imjjgc/easy_way_to_make_clay_sculptures_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/gujurolekuma/gienijp/nujuvan.pdfIn PDF document text
    • http://zosuwalerikare.getenjoyment.net/33409996161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_602fa48a8ec03.pdfIn PDF document text
    • http://bigtittybella.com/little_book_of_common_sense_investing_2017vfbvr.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/tattoo_aftercare_sheet.pdfIn PDF document text
    • http://polnews.xyz/youtube_dance_music_90s_workoutxypa9.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/ghgz7jg/29049002011.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_8a65014233b84759aa433c6bc20a4b26.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/wotaxifaxidadejago.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_255e2e0fbb8c4045bdcec5dfb6664592.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/what_is_an_informative_essay_example.pdfIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_5834afe2b6794312a3b80f86913ed769.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_4d40f5249a364ac5b24eaaa239eacc67.pdf?index=trueIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/adjectives_to_describe_a_person.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/timofoxilozike.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/zolumatope.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_off00010170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10170 5604 bytes
SHA-256: 1a7687a7db13f895ab274583c21e540c6c68fd672e00c7f611700f3b0b08578c
font_01_sfnt_off00011466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11466 11404 bytes
SHA-256: 90ee6079656a2af659092bf494eea8247c8e32bd4010ff1ffe49d0238fef2ac4

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