Malicious PDF — malware analysis report

Static analysis result for SHA-256 6812cd4f5495c545…

MALICIOUS

PDF

94.4 KB Created: 2021-02-26 00:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 712bc3682474139e54508a2ff256ab82 SHA-1: 197a6b74d00677e83e84a6d48f9c1d5a271d7b60 SHA-256: 6812cd4f5495c545390926aee1db8f2f3a042ef58ab9d565104394b73d17fff6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wb?keyword=what%20are%20the%204%20ethical%20principles%20in%20nursing PDF link annotation
    • https://cdn.sqhk.co/jasurisunav/cp2icdU/lekidiboki.pdfIn PDF document text
    • http://richteam.site/fire_protection_design_guidelines0noh1.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/9243769.pdfIn PDF document text
    • http://uptodate.site/745573419659j0jt.pdfIn PDF document text
    • https://rodifeganugupi.weebly.com/uploads/1/3/2/8/132815003/bb12a.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/harbor_breeze_mazon_ceiling_fan_light_bulb_replacement.pdfIn PDF document text
    • https://tupadutuxoti.weebly.com/uploads/1/3/5/9/135974222/vujatetafozi_pamugokaziwa.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/jigNXjg/19435118779.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/is_microsoft_flight_sim_coming_to_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/rebabafa/gcif4id/in_the_living_room_app.pdfIn PDF document text
    • http://interstart.online/photoshop_cc_2015_brushes_pack_freep9hsp.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/RYtxsDw/rada_knife_sharpener_walmart.pdfIn PDF document text
    • http://ewop.space/skyrim_bodyslide_cbbe_tutorial5vtoz.pdfIn PDF document text
    • https://puxetesotomu.weebly.com/uploads/1/3/0/7/130739839/sijerabofenu_nafuzaga.pdfIn PDF document text
    • http://photoforce.ru/technology_brewing_and_malting_by_wolfgang_kunzesv8gf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001378b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378B 5296 bytes
SHA-256: ac1a47863eca2b5d0582b3e5e88840de77e8a0a5e629ed6900fb2ab6628d1c35
font_01_sfnt_off0001499d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1499D 10268 bytes
SHA-256: 8490d6549ea1f4b45e460caf659513e44aaf31d88f4e4906fcac618c4ec6bd6e