Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c762583a9c21c1…

MALICIOUS

PDF

78.2 KB Created: 2021-03-29 16:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7415be673363cbab048eaac6f644be76 SHA-1: 18d84633dc6e0d1d8861c07af19bcac74e95b455 SHA-256: e5c762583a9c21c1a916f5af950c6daa618168f11a60561a048b2fe72f68efa0
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-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://pelibifir.ru/award?keyword=rearrange+pdf+pages+foxit PDF link annotation
    • https://cdn.sqhk.co/wifinalimow/g7nhiUE/tumblr_app_photos_not_loading.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/Uia85jc/4130534430.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/casio_wave_ceptor_tough_solar_manual_50531om6k.pdfIn PDF document text
    • https://cdn.sqhk.co/kamugututu/ihG8jbj/attire_guide_bridesmaid_jawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481052/normal_605fe6ca4556f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373522/normal_5fe24bba9013c.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/6qgdKJL/total_destruction_the_only_solution_meaning.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/78661811348.pdfIn PDF document text
    • http://businesslinecenter.com/how_much_do_beginner_freelance_writers_makebrjtd.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/cutting_edge_elementary_third_edition_workbook.pdfIn PDF document text
    • https://cdn.sqhk.co/gowozepugax/68ghigh/diy_ball_holder_for_garage.pdfIn PDF document text
    • http://micrometerdigital.xyz/who_are_the_characters_in_war_and_peacebp6mw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5fdc60b945eb6.pdfIn PDF document text
    • http://lobafor.mypressonline.com/44240780690.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/hbRh1Jc/microbes_cause_global_warming.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_6043751f9b24d.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/jas3lia/solar_system_scope_pro_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bodajaku/xusowulekutadasozemuzip.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/aoe_1_ban_chuan.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/kimewebesusofomoju.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/kazav.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 5252 bytes
SHA-256: ac3e762c97e515e96cfdfe05d476bf1f6a0943b5fc50c493e54e0d522acada6d
font_01_sfnt_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 9832 bytes
SHA-256: fa9676d82d93a8c4dd5d6b0184782b0496a8d75bc092864fad8c682c1663fcde

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