Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdfa9c47e06a4fc…

MALICIOUS

PDF

68.7 KB Created: 2021-02-12 01:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b3c8eb85999e735158f726486f7bb4cc SHA-1: 456e8cb984f37bd5d28514ba27d0f64cdbdd9f56 SHA-256: 6fdfa9c47e06a4fc71cf3aea74896e9f61b28d3503ea63d689997cf6891c5c3f
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=pet+food+center+owensboro+ky In PDF document text
    • https://zomuguzilax.weebly.com/uploads/1/3/5/3/135327960/c81a5a.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/ghfA1jh/online_compiler_java_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kadunila/ggiajnf/screen_time_app_limit_not_working.pdfIn PDF document text
    • https://titerafutar.weebly.com/uploads/1/3/0/7/130775646/1549388.pdfIn PDF document text
    • https://cdn.sqhk.co/lepezusija/hjQijjg/pinballz_arcade_halloween.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/cUJhjih/football_manager_handheld_2015_apk_cracked.pdfIn PDF document text
    • https://nutarubanamu.weebly.com/uploads/1/3/4/5/134528768/acf7983fe.pdfIn PDF document text
    • https://fagozozefixus.weebly.com/uploads/1/3/4/8/134846406/8851e00e045cc75.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/hchdZHK/all_creatures_great_and_small_2020_review.pdfIn PDF document text
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/kekizetu-wudonuwefitov-banevigomi.pdfIn PDF document text
    • http://tasezupu.22web.org/wasteland_survival_hack_android.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/ahd7TYI/pixel_world_3d_pc_download_2020.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/sodujekewasegemeli.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/zHIQihj/photomath_app_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzasapexuwuju.epizy.com/gebozowosofunod.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/fruits_of_the_holy_spirit_catholic.pdfIn PDF document text
    • http://wulimazef.epizy.com/jingle_bells_piano_violin_sheet_music.pdfIn PDF document text
    • http://pavinudoj.epizy.com/godikixibo.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_off0000cfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAA 5172 bytes
SHA-256: 7866b0af7364d82a2677d9dff82145f4674345bf779a572992e53dc4dc94c124
font_01_sfnt_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 10732 bytes
SHA-256: cdba5d7f37aeda1de3a8f99fb6fb6dc0a0bbccab1a68c77c58de826da70db95f