Malicious PDF — malware analysis report

Static analysis result for SHA-256 62420a567a5f108b…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 23:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cfd3a4e5ead3a3be70a0e8214f5c7076 SHA-1: 5f27449830873df052e6e64453aa58943cfe4aa9 SHA-256: 62420a567a5f108b17bc3da0d42b49da2fed9b39a1bb05bda7c735d3f3a0e8bb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

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
  • 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://resalured.ru/award?keyword=bridges+math+grade+4+pdf PDF link annotation
    • https://cdn.sqhk.co/mewowoji/heIshhP/wikasolafodezad.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/mDU6ie1/zobuzel.pdfIn PDF document text
    • https://dominegum.weebly.com/uploads/1/3/4/3/134370126/lufawagagizi.pdfIn PDF document text
    • http://mini-camera-super.club/56609623714m290d.pdfIn PDF document text
    • https://papukelub.weebly.com/uploads/1/3/4/6/134666119/98299.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/21115780331.pdfIn PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/fewetapuwop.pdfIn PDF document text
    • http://lovelyhouse.online/politics_and_the_english_languageqdrfl.pdfIn PDF document text
    • https://cdn.sqhk.co/palevisi/aicjvjb/cubic_boxing_3d_apk_hack.pdfIn PDF document text
    • https://kukibujez.weebly.com/uploads/1/3/1/6/131637652/48ea265011059e5.pdfIn PDF document text
    • https://tepiduti.weebly.com/uploads/1/3/5/9/135974730/8464978.pdfIn PDF document text
    • https://nogexumojadug.weebly.com/uploads/1/3/4/2/134235638/xoneputapiv.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/osaka_metro_map_english.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/3495819.pdfIn PDF document text
    • https://cdn.sqhk.co/karelevo/hgYgcjg/99485545145.pdfIn PDF document text
    • https://gituwelogasof.weebly.com/uploads/1/3/2/8/132814340/xuramajaxapem.pdfIn PDF document text
    • http://pay-order.info/catfish_bait_near_mejay6y.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/7e13a.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/fbijQKo/nba_games_live_scores.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/soil_mechanics_and_foundations_budhu_espaol.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_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 5560 bytes
SHA-256: ed8c71049bbf6aa7ade05f908b786be797bcb67c81da20218f1111dc76da82ba
font_01_sfnt_off00010bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBF 10676 bytes
SHA-256: 0688a5bdc659477e1492cf9744ace9a1a03fb4a625fd1c7fac0b5c1b6cf04b3d

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