Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e0e783084eec72…

MALICIOUS

PDF

71.5 KB Created: 2021-02-24 14:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 100bd10c94808b3c3ea8b4a2b0d175ce SHA-1: c3bb205c077e49f3514d3b1c61b015e030c28e4f SHA-256: 54e0e783084eec721bf2b3c3e5749f4bae68af2aa49915e91266b378c71758cd
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/wix?keyword=skeletal+system+worksheet+key In PDF document text
    • https://static.s123-cdn-static.com/uploads/4469136/normal_5fc79944c0445.pdfIn PDF document text
    • https://cdn.sqhk.co/sofopiro/iahf2RB/dragon_hills_2_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/daxggXG/botal_bhangibi_gori_to_duare_sambalpuri_dj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_60109f4164904.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/Ihezibr/vuwivewat.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/ieggeGq/btd_battles_mod_apk_6._8.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/5083323.pdfIn PDF document text
    • https://sekepavikaforo.weebly.com/uploads/1/3/4/6/134608196/jirulupaminaz_dodexotaxakibak.pdfIn PDF document text
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/3809291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fe4303e8e880.pdfIn PDF document text
    • https://dikarofojosej.weebly.com/uploads/1/3/3/9/133988548/zigojexilaj.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/vgehiic/mewebakegin.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesijoja/gtEyKjf/pee_sounds_like_frying_chicken.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/Ttgchga/black_christmas_stockings_personalized.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/c25ggyl/83859513236.pdfIn PDF document text
    • https://norasavunoga.weebly.com/uploads/1/3/0/8/130874384/3176167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rifavewo.epizy.com/switch_pro_controller_android_pairing.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_off0000dbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF9 5284 bytes
SHA-256: f3758b83d83d46d115aac880f5efeff266861d5ce7f5b50d62be1cbeb95d9e11
font_01_sfnt_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 10364 bytes
SHA-256: e1a2ba3bfa55dbb4a102e8cf62858fcbfddc3eb8fae95bca6f48d5c4f534ae8c