Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff239aba73694098…

MALICIOUS

PDF

79.6 KB Created: 2021-03-14 06:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7bbf2de83cb3284ab2cfcb42ee83280c SHA-1: 9a58dd2b3cd9e48ed76b4cf8ec3f0687caf8c9e4 SHA-256: ff239aba73694098e79bd05f0b1014d78c85d7f841990f13b4bacc1c7411d9ff
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 0.9996

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://mezovuduw.ru/award?keyword=bridal+shower+gift+list+pdf PDF link annotation
    • http://bagerisevi.scienceontheweb.net/moen_sink_faucet_parts_diagram.pdfIn PDF document text
    • http://ek-arenda.ru/wukazamawemipogafutumak64c1b.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/vatofasukobigukuwudani.pdfIn PDF document text
    • http://covid-19online.site/797765684736sx9p.pdfIn PDF document text
    • http://metazoaapc.fun/outdoor_garden_decorative_balls2l9jj.pdfIn PDF document text
    • http://winfreeiphone.xyz/vidamap76lk2.pdfIn PDF document text
    • http://bunakevogipo.iblogger.org/85150119843.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxuramubot.epizy.com/xurav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50cb01a0-adb3-4d7e-8f6a-d04f0c3c20e7/cabrio_dryer_wont_spin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5754b569-42a4-41ff-864b-b4c00cd615df/bipimepisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8529db-bcdc-4cea-b1ef-2a27118a8e5d/40088765489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c12cb2-0c4a-4c3d-b9a5-271729b80395/kojajiboxusadobeginur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c8b65d-770d-426d-a00e-c738758e6f96/a_12-month_insurance_policy_was_purchased_on_dec._1_for_3_600.pdfIn PDF document text
    • http://sofibimibojas.myartsonline.com/hottest_and_coldest_place_on_earth_now.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/toro_electric_snow_blower_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42db1ec-9958-4c6d-9b39-176aa6ae02e2/24329958714.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/free_holiday_party_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/31775771851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45d10d9-af71-4f9e-8b49-da415f2da722/how_many_carbs_are_in_a_dunkin_donuts_iced_coffee.pdfIn PDF document text
    • http://gegurobaz.myartsonline.com/wexoxiferovexevosofadunu.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/who_has_been_named_peoples_sexiest_man_alive_the_most.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c4eb48-055f-4e19-93b1-f17250faad36/bumoxoj.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_off0000f9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 5444 bytes
SHA-256: 3ee55d3fad0aac991b0f822e9554b15c7782718b98c818605a9021cd75cd64f8
font_01_sfnt_off00010c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 10712 bytes
SHA-256: 889dc77580d96fcc56f2ab5016a729f779f293da5bb3201039f8d31f9a6777eb

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