Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d543d7f04653612…

MALICIOUS

PDF

82.4 KB Created: 2021-03-10 07:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 042a320d585ca7f2e2dfa5379129352e SHA-1: 58d19e1488964cb82914dd8eaf174536f81312bb SHA-256: 3d543d7f0465361246835f3e248536e38bb0fe26d4af26bcc4785867db6ff9ed
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with 30 external links, many pointing to disposable hosting, and one directly to 'gimoguvi.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'Minecraft galacticraft crafting'. The presence of numerous external links suggests an attempt to redirect users to potentially malicious websites or to generate traffic for SEO purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=minecraft+galacticraft+crafting PDF link annotation
    • https://cdn.sqhk.co/kisesawaropo/hfjfoEX/dragon_ball_legends_jiren.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/nqgjXEv/ronilos.pdfIn PDF document text
    • https://buvawaxeve.weebly.com/uploads/1/3/0/8/130874113/xidos-gajotif-vopobedi.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/what_is_the_teachings_of_don_juan_about.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/kyocera_ecosys_printer_manual.pdfIn PDF document text
    • https://niritamin.weebly.com/uploads/1/3/4/4/134486676/7a3f0318eb02643.pdfIn PDF document text
    • https://nevofegef.weebly.com/uploads/1/3/4/8/134851200/kitafopemaguxifemu.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/65334683760.pdfIn PDF document text
    • https://nuzukozifazo.weebly.com/uploads/1/3/2/6/132682871/bamepa.pdfIn PDF document text
    • https://bumovewadenol.weebly.com/uploads/1/3/5/3/135318567/sutomaruluxoxe-kuvotikozura-musosukumod-lozototuxuregi.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/why_does_my_headset_not_work_with_my_xbox_one_controller.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/483dc079-1d8d-41b8-94ce-212b22153591/duzanilodamewezun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa533a48-f164-4f76-80ad-ee5349f8bb60/what_causes_poor_intestinal_motility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbe3c07-fc27-4a0d-b2a3-cbe110bd10a2/what_is_computer_terminology_explain_in_brief.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa9cc41-b8c3-4ef8-92b9-5186ec66f39b/thirteen_reasons_why_season_3_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5285a37b-8d62-40ab-9577-f7aa9705a454/gisevovaditobepefajetaf.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/85015189698.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/rilegakonevukagizefojemo.pdfIn PDF document text
    • http://woporebokut.rf.gd/interior_designing_jobs_in_navi_mumbai.pdfIn PDF document text
    • http://puliwoxijulu.rf.gd/why_does_my_sims_4_keep_crashing_november_2020.pdfIn PDF document text
    • http://pivirujifija.epizy.com/tagusoxajireri.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_off000108cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CF 4876 bytes
SHA-256: 49d176c492ed2024277bb1e2d31cd3041af3554285d34d7a47c14b99dbcadc73
font_01_sfnt_off00011984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11984 10052 bytes
SHA-256: 743ff52ca69b8d21082c19b088563bd1336df6a09f6d712a5632122b753dcae6