Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc5cf004dddb459…

MALICIOUS

PDF

89.2 KB Created: 2021-03-18 10:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1ce333a33bbe2576ba7e52567e753d3d SHA-1: e1d1a54bbc099f3ea7009c01de07fceaeb00eebf SHA-256: ffc5cf004dddb459574dd182ca3f33c17fbf8686a63224478fe2d77d44a17952
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a technique commonly used for SEO-based link farms and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links, such as 'https://botokaw.ru/123?utm_term=consumer+reports+arsenic+in+rice', suggest a lure to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/123?utm_term=consumer+reports+arsenic+in+rice PDF link annotation
    • https://cdn.sqhk.co/fafujedajir/idnBqjj/94520950909.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/hViahjF/black_furniture_bedroom_ideas_pinterest.pdfIn PDF document text
    • https://zavowije.weebly.com/uploads/1/3/2/6/132680855/sotajitu_zilowikuk_gesesifixuwoso.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/jaJhbhi/free_spring_wallpaper_for_iphone_8.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/Tlgem5B/bedoyecta_tri_inyecciones.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/hgXrjew/phoenix_zoo_lights_military_discount.pdfIn PDF document text
    • https://pakunifa.weebly.com/uploads/1/3/5/3/135307874/nokuwevogoxu_butomuxa_kesonabanuzidi_gapilagu.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/47137340410.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/suzekeba.pdfIn PDF document text
    • https://cdn.sqhk.co/dokamaruxif/Khjhdc9/tap_tap_fish_mod_apk_happymod.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/SicOxia/ligusoji.pdfIn PDF document text
    • https://kenafowipadile.weebly.com/uploads/1/3/1/4/131437871/bebosudezap.pdfIn PDF document text
    • https://rodifeganugupi.weebly.com/uploads/1/3/2/8/132815003/0583561a5711c.pdfIn PDF document text
    • https://rasetakewalufil.weebly.com/uploads/1/3/6/0/136086978/tidorogizejejasurod.pdfIn PDF document text
    • https://rofajubufilotol.weebly.com/uploads/1/3/1/3/131384128/6e34102.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/gifgiQu/xobawitukomigujopidose.pdfIn PDF document text
    • http://gafuvufafokujop.sportsontheweb.net/esquizofrenia_paranoide_cronica.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/fjjiihb/sms_spy_online_free.pdfIn PDF document text
    • https://gitizurozid.weebly.com/uploads/1/3/0/7/130775734/0e5d74.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/foigVij/19847840561.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/4645468.pdfIn PDF document text
    • https://revabusabozuvum.weebly.com/uploads/1/3/5/3/135398016/4916420.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/DhhOA6W/87131768440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vizomonuzujo.onlinewebshop.net/16963066811.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_off00012024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12024 4952 bytes
SHA-256: 007574541937432061a7f383821ab033370fe3e9db981fac16b9dbd08aebeb9f
font_01_sfnt_off000130d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D9 11372 bytes
SHA-256: ed3d5422c891b7c5cfed87802c7c297906bb4b37810f15b7763d1e62724cead0