Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cec9da034e8803…

MALICIOUS

PDF

82.4 KB Created: 2021-04-05 01:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7182c57c2eebe9246ac161d73fbd91ee SHA-1: 1027cbf6f72b3cefa43f3bdde23ad5b69367b7f7 SHA-256: 07cec9da034e8803b7b3f1ce8257db20633a13f28ffc752c4fef8faa983d8c4c
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=best+android+phones+2017+canada PDF link annotation
    • http://kusafomidufe.mywebcommunity.org/cfd_in_matlab.pdfIn PDF document text
    • https://cdn.sqhk.co/jipuxoxukul/KWfqji7/20318481382.pdfIn PDF document text
    • http://fomigiv.mypressonline.com/legend_of_zelda_ocarina_of_time_3ds_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474989/normal_60673192cc02f.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/how_many_pages_are_in_the_series_of_unfortunate_events_book_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459025/normal_600505853fb5b.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/3hhyXxa/dungeon_survivor_2_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/hhfkGe7/green_new_deal_farting_cows.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/WkehfZf/5_seconds_of_summer_2020_uk_tour.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fe42657d289c.pdfIn PDF document text
    • http://futajef.medianewsonline.com/vosubudekeguzoxad.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/53283043741.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/YwgfgeQ/angry_gran_toss_hacked_unblocked_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fe63b051578d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5fe985ad098c9.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/lebinukis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodowurivav.onlinewebshop.net/how_to_get_approved_for_business_line_of_credit.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/mojiruligo.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_58e92f5fdcef4a3dba9a20110fcc6b89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mizeteb/xutibedulizirevelumowebi.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/how_to_describe_a_forest_floor.pdfIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_462240d03c3a4409903e867b0ef998e4.pdf?index=trueIn 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_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 5584 bytes
SHA-256: 05206d527b6e86129582e1d2de4923c163d0029312374aacb640ad6ad0a899ce
font_01_sfnt_off0001148d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148D 11260 bytes
SHA-256: b958200e7932d8932d414561f5dd04532d4a6f2941554a1dc51527cd720a47d0

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