Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fd01c3216efc52…

MALICIOUS

PDF

115.3 KB Created: 2021-03-11 03:09:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: aa6599b3b6759bebea73b421cc9f8053 SHA-1: 54243455c62b0e6b7ba04d41ab2393776611811e SHA-256: 04fd01c3216efc529ddf31829aa60f6526e28f5c88a76161ab6d824cf7869e50
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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://seumenha.ru/award?keyword=candidiasis+bucal+pdf PDF link annotation
    • https://cdn.sqhk.co/japexexuko/ieCK5jc/car_emi_calculator_california.pdfIn PDF document text
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/e92dd2a780.pdfIn PDF document text
    • https://lakogobeza.weebly.com/uploads/1/3/4/0/134096968/bedudu.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/giwiwirerudena.pdfIn PDF document text
    • https://nelemiken.weebly.com/uploads/1/3/4/7/134704654/486b7.pdfIn PDF document text
    • https://zofitete.weebly.com/uploads/1/3/2/7/132740948/sifajo.pdfIn PDF document text
    • https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/lajekekexegev.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/jaYgdgi/disney_team_of_heroes_badges.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/tunigesiroboxokajef.pdfIn PDF document text
    • https://mixezefu.weebly.com/uploads/1/3/0/8/130874535/6468575.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/jufuxisudowudokamuw.pdfIn PDF document text
    • https://vufujisuwe.weebly.com/uploads/1/3/1/4/131437295/9098581.pdfIn PDF document text
    • https://taxurazuzar.weebly.com/uploads/1/3/4/0/134042721/300158.pdfIn PDF document text
    • https://pobapuzelikawe.weebly.com/uploads/1/3/0/7/130739661/586155d9d914642.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/wuwasewajuzugogid.pdfIn PDF document text
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/nitonidejisab_timisojon_xoxoduz.pdfIn PDF document text
    • https://cdn.sqhk.co/dubeminap/jhdY5ig/concrete_technology_mcqs_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/jg9k0ia/letitetibubimolixe.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/wgcjehb/best_mountain_bike_trail_gps.pdfIn PDF document text
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/gelipalepudu.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/441f316b6.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/6019646.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/tunepat_amazon_music_converter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/bafg_antrag_formblatt_2_uni.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/tobijiwipomupajugewifu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/how_to_change_the_time_on_a_pioneer_radio_deh-1300mp.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FCE 4792 bytes
SHA-256: 693eb637f15fc1a105c626d904817ff6d08e39e7148753d166e9b43473ecd8f1
font_01_sfnt_off00018017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18017 15540 bytes
SHA-256: 4098dd572de612ec8ced214405e4809a2453e43e0dae1b5385af93c5f71e143e
font_02_sfnt_off0001b0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0C3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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