Malicious PDF — malware analysis report

Static analysis result for SHA-256 361c5aad0961fe94…

MALICIOUS

PDF

82.9 KB Created: 2021-03-03 16:21:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6da9ee1beab88b6e94cc222d622ef309 SHA-1: 668d9135692b951e1535442da05e6ce19c904209 SHA-256: 361c5aad0961fe94315af63852a7e433c31dbfbff57d9b049cf0d450b8b8155a
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 0.9994

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://jottigo.ru/strik?utm_term=transit+anna+seghers PDF link annotation
    • http://armada.technology/dezofanubofusakemogijfgu50.pdfIn PDF document text
    • https://lefipejime.weebly.com/uploads/1/3/4/6/134668800/jubawe.pdfIn PDF document text
    • http://venira.su/novipazigabinifewenelizibpr5cq.pdfIn PDF document text
    • http://cardio-natural.info/jawbone_big_jambox_repairgxxur.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/fobidiso.pdfIn PDF document text
    • http://ebay-coupon.ru/arena_football_league_2020dm0cq.pdfIn PDF document text
    • https://wizujepubenepax.weebly.com/uploads/1/3/5/3/135317151/c1a55b.pdfIn PDF document text
    • http://itagreen.fun/19688061187opziw.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/80873362204.pdfIn PDF document text
    • http://mebelrostov.ru/in_dulci_jubilo_bach17zh1.pdfIn PDF document text
    • http://0fruits.space/bodybuilder_photos_free100hc.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/a_short_guide_to_writing_about_film_9th_edition_ebook.pdfIn PDF document text
    • https://gakutuzopekok.weebly.com/uploads/1/3/4/6/134605442/felaxizowu.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/mefuf.pdfIn PDF document text
    • http://twirlini.com/sony_rx100_vii_vs_vic0ztd.pdfIn PDF document text
    • http://hrushch.space/jejalenpn0u.pdfIn PDF document text
    • http://lesantyqas.online/94539559756vfqsi.pdfIn PDF document text
    • http://zespodsvetkoy.site/super_mechs_codes4rrdg.pdfIn PDF document text
    • https://soberonapi.weebly.com/uploads/1/3/2/6/132681790/2623661.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/malayalam_album_songs_free_320kbps9ysop.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/fadedosi/554950696.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/branded_formal_shirts_online_india.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/competent_e._coli_cells_transformation.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_off00010949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10949 4864 bytes
SHA-256: 9b8f35c266df65eb0212b462087f0c01f3f74f8274ea22f1dc12e7db133d088f
font_01_sfnt_off000119c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C9 10904 bytes
SHA-256: 3f5f58e4c70572374af1335a9a508cbffa0114cc8dad53ca19a380c390e45d7e

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