Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab0a8e164722e7b…

MALICIOUS

PDF

83.7 KB Created: 2021-03-14 14:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63a0976b736342d8dc49fb6dd65496f2 SHA-1: 9cc639edb96706f3994e952d2024a3321a91077a SHA-256: 0ab0a8e164722e7b31307a1330535e23a908b237c33b10b7fbeaeefa37ade67e
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 0.9993

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://lozipotod.ru/award?keyword=cisco+ccna+certification+exam+questions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447086/normal_6035219ba5f93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420761/normal_5fc87a783eeb8.pdfIn PDF document text
    • http://jalojewaga.mypressonline.com/wild_animals_information_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_601cd178be802.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/59396328150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_603ef47150f51.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/jezasas.pdfIn PDF document text
    • http://pirunumilusarib.sportsontheweb.net/array_of_pointers_in_c.pdfIn PDF document text
    • http://dawajilimomod.iblogger.org/77242284712.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/10480290563.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/44454879716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_601c70f8675fc.pdfIn PDF document text
    • http://lotefevedajo.22web.org/garmin_234_vs_245.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/zuguvoxoki/where_to_buy_bed_sheets_in_hanoi.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/sakofeletogixuvumiko.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/ruweribemejulave.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/12850242679.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/super_smash_bros_lifelight_piano_sheet_music.pdfIn PDF document text
    • http://rodexiguv.onlinewebshop.net/android_developer_fresher_resume.pdfIn PDF document text
    • http://keviful.epizy.com/smile_girl_images.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/hdhomerun_live_channels_android_tv.pdfIn PDF document text
    • http://xujiwusa.epizy.com/kenexa_prove_it_accounting_test_answers.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/how_to_replace_dryer_belt_on_kenmore_stackable.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/31168896692.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_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 5368 bytes
SHA-256: b068a6040e68d92322b2ac4d72a858161b7bbe4aab4d6b6dfd4667f344778ee4
font_01_sfnt_off0001196a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196A 11252 bytes
SHA-256: e2aada2b98d412cbe368eeff8cebeb6eed22f688435ce20ccb5a1b415705eb8b

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