Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61e4b1bff8e2204…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 07:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7fe8751ee6871110b49c334b122ef731 SHA-1: c5df04fc72623ec92799bfe15f8470b14ff9ddf1 SHA-256: a61e4b1bff8e220469e12b2fbd568b771c44b0d7d76ab1c003cb6ffe39fb799e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=blue+point+school PDF link annotation
    • https://cdn.sqhk.co/dadirowuj/YhhjiUb/nasal_polyps_bleeding.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/fjhjjhj/mogiguku.pdfIn PDF document text
    • https://fokutape.weebly.com/uploads/1/3/2/8/132814024/notaperuwo_tekarovumawetas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486201/normal_600678d12e458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446776/normal_60293d7753d56.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/gadotapugiwib-fupagamejapepo-fuwusivitides-rebazudi.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/ijJ93fD/greek_mythology_enyo_goddess.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/gfhahi0/maze_runner_books_in_order_to_read.pdfIn PDF document text
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/sefesexa_konusifajuzixi_siwaxesaj_tozomovilusit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_60107599d5564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476580/normal_600037bdac764.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/gBy8ijZ/steam_inventory_value_dota.pdfIn PDF document text
    • http://dkmz1.club/xln_audio_addictive_drums_2_complete_v2.1.98jfbp.pdfIn PDF document text
    • http://xteenware.online/afrosound_and_semitondj4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_602823b451a04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dikobepibelun/bushnell_phantom_golf_gps_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/bleach_vs_naruto_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/aristoteles_y_dante_descargar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C0 4648 bytes
SHA-256: 51a6a3ab6c1affaadbd5a51d27efa105fca997328a0578e7d4bb8c5d2588150b
font_01_sfnt_off0000e58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58B 10600 bytes
SHA-256: ec94976944c0541c6efb01397ad9c34ae83b77127f147e9a9fab163c65554113
font_02_sfnt_off0001099b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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