Malicious PDF — malware analysis report

Static analysis result for SHA-256 e834009efbce236d…

MALICIOUS

PDF

81.3 KB Created: 2021-03-22 16:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f9585a08b9c973ecaec3c9e2b9041b32 SHA-1: c6047b4a228c0d6be4e1f70f99b1840ac6459cb6 SHA-256: e834009efbce236d2e5c7e764d4cc76de927805bdf086668954abcd644ac6120
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://xezojetit.ru/award?keyword=adda247+math+book+pdf PDF link annotation
    • https://cdn.sqhk.co/dobulefipuji/BNhbV8c/25224688771.pdfIn PDF document text
    • http://mmuuue.space/rip_slyme_super_shooterranns.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/zarowuxawo.pdfIn PDF document text
    • http://lianhua.life/hotel_restaurant_and_travel_law_7th_edition_chapter_1gf992.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/69611509941.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/jgfm0ei/best_pop_up_truck_camper_brands.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/agriculture_definition_meaning_and_its_branches.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/momiba.pdfIn PDF document text
    • http://onlyforyou.space/1212_step_6dhetn.pdfIn PDF document text
    • http://c-advance.space/92559264845cec3l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e54f0fb-6612-482d-ac59-da77b2cf9307/reading_text_the_martian_a_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/oxygenos_9._0._5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9940cf-87b9-4067-89ff-df58d1a530bf/why_does_my_chainsaw_leak_chain_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/revax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7165ef32-dfc1-46b7-b4b2-83433b98ba59/18270918634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef0b52c0-d81b-452b-8375-95c05c0866de/joyetech_evic_vtc_mini_atomizer_short.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fe2c06-a920-433f-89ac-433b087d9870/65888204904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a003f6b8-fe52-4590-bcac-58cdac9a518d/dlink_dir-890l_default_password.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/22061644273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d663e877-e459-44e3-9968-6e68cd4e42ea/vineland_adaptive_behavior_scales_scoring.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/avatar_full_movie_in_telugu_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/sojibibesedulolatot.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_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 5468 bytes
SHA-256: 53da32e111498c8a061cdd8e90a4c5b2b178e26588aa1743430dd508b2cdafef
font_01_sfnt_off00011360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 10692 bytes
SHA-256: 35756aa11c3e42e924e3ed286bd85a99e4d23b036b0f45032c29f0a8e2602159

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