Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71134377a008422…

MALICIOUS

PDF

78.5 KB Created: 2021-03-17 20:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a8a92c72f7eda52d4b3d3a6f53292670 SHA-1: c4cd59620bc677b5d28f450aece9c10168c3d9b1 SHA-256: e71134377a008422f07cca49ef4731e77f2933d4c7572e7ef67a35e365adf5a1
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to lead users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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 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://botokaw.ru/award?keyword=aladdin+story+book+pdf PDF link annotation
    • https://cdn.sqhk.co/zefadanexa/hghagjf/45757131335.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/ridunubikewewupokulomefim.pdfIn PDF document text
    • http://pro-komp-master.website/fantastic_beasts_and_where_to_find_them_film_netflixxfe9u.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/navy_advancement_results_fall_2020_selres.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401982/normal_5ffdc4c2f1fc6.pdfIn PDF document text
    • http://petrol-v-pol-price.site/daxewekirixiroditlbgo6.pdfIn PDF document text
    • http://dokumenty-kiev.online/homelite_super_2_carburetor_settings2ycgn.pdfIn PDF document text
    • http://firstdoctor.xyz/advanced_excel_myanmar3swkc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_602baf04bec09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_602abc0358478.pdfIn PDF document text
    • http://ehaberdevlet.com/50933467846p1kwj.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/vjbhibI/psychology_malayalam_free.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/33616796468.pdfIn PDF document text
    • https://cdn.sqhk.co/pawiwodogu/gjriche/airnav_radarbox_pro_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5fde13788587d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5fcb8e0fcf10e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_6025efc5259d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493890/normal_6008915759ba1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5ff90a1ca89cd.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/aquatica_park_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5fc96aae75778.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/blank_outline_map_of_the_world_to_print.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/guidepost_montessori_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/60804031967.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/cb_background_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/massive_hemothorax_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/texas_world_history_textbook_answers.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_off0000f5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AF 5332 bytes
SHA-256: f6d8c6cbfb2e28d95802a6aeb31b84e1581b87269c1ca1cdff288bc09b0237f5
font_01_sfnt_off000107e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E2 10776 bytes
SHA-256: 829650670f19a575f4077ec95d61e5e56b7df9886741bce71ebae92c7e4ea6db