Malicious PDF — malware analysis report

Static analysis result for SHA-256 5357998ff8274001…

MALICIOUS

PDF

77.7 KB Created: 2021-04-06 11:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5d36b3e7d8b9c5a446556d7f47c2cee6 SHA-1: 7528c30debd64a3fe989ec779fa2e52804ea5ce3 SHA-256: 5357998ff8274001b0f4390fa207f08668bbaf3d337eb881c626b5bfee5090d7
126 Risk Score

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://fokemale.ru/aws?utm_term=how+to+use+the+ninja+as+a+juicer PDF link annotation
    • https://sekojeti.weebly.com/uploads/1/3/4/5/134583019/vupumukileb_mezimufi_mupejetazugum.pdfIn PDF document text
    • https://vadibuxazuxubaw.weebly.com/uploads/1/3/4/8/134855910/4740913.pdfIn PDF document text
    • https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/8000311.pdfIn PDF document text
    • http://bonozowibewoz.mypressonline.com/plant_systematics_a_phylogenetic_approach_4th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/vSkzhcU/97015357104.pdfIn PDF document text
    • http://inertbhjbj.ru/xedabrjiss.pdfIn PDF document text
    • https://fikomepa.weebly.com/uploads/1/3/5/2/135299400/zirajasedipid.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/hem8hj8/sandwich_maker_price_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/asjnwzp/best_electronic_music_for_studying.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/jekitilesuxopig.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/life_skills_curriculum_for_adults_with_mental_illness9nbyz.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/17519549758.pdfIn PDF document text
    • http://tehnotop.store/how_to_update_android_tv_box_a95xt4z6f.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/camara_lucida_roland_barthes.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/gidibesuxi/sindrome_de_abstinencia_al_alcohol.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/arena_of_valor_superman_guide.pdfIn PDF document text
    • http://zuputes.atwebpages.com/67231365486.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/81819592544.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/71300227939.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/evento_vascular_cerebral_isquemico_y_hemorragico.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_off0000e423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE423 4868 bytes
SHA-256: c9b5b9dc8fd161ec9fe785a95291fb5f2db9f46d27c1ee34d3a4639c92fa3fee
font_01_sfnt_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 10892 bytes
SHA-256: 813a78a42f2776a86c73e6e13e0128935c65f58b8d1e09d68db1f2695aabb3e0
font_02_sfnt_off000119ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.