Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c274d8e5f3e5d5…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 17:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b4dcbe8b145881a1c8e4923921d8d3a6 SHA-1: ae8efcc0ca56a80ba312d0276bc4e6c3ee622112 SHA-256: 53c274d8e5f3e5d557f9dd0d956bd05c6c18e2fd6e66a174252287467ca37730
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic to drive traffic to malicious sites. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://zajinet.ru/award?keyword=robotics+engineering+handbook+pdf PDF link annotation
    • https://wigawiwamenusum.weebly.com/uploads/1/3/5/3/135323889/d3b98b3efd09d4.pdfIn PDF document text
    • http://luxshop21.site/how_long_is_harry_potter_6_without_creditsn48cp.pdfIn PDF document text
    • http://apeech.ru/520663615236rhbq.pdfIn PDF document text
    • https://gojanaribebiw.weebly.com/uploads/1/3/1/4/131437307/xuwaluvakek-tudakurinejelo.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/vhciEjf/karelawabazeletulasivow.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/jiibYxu/smart_balance_buttery_spread_dairy_free.pdfIn PDF document text
    • http://submonster.xyz/everstart_jump_starter_750_amp_not_charging3j5x0.pdfIn PDF document text
    • http://pokemonrivals.online/what_does_red_light_on_furnace_mean0ulad.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/41960705883.pdfIn PDF document text
    • http://mizifasurogik.mywebcommunity.org/xopazat.pdfIn PDF document text
    • http://housefashion.ru/rifijetusasafimp5dl.pdfIn PDF document text
    • https://popepinasi.weebly.com/uploads/1/3/4/8/134892117/gitepibagebi-sakiwizoji-bemade-menega.pdfIn PDF document text
    • http://vanlit.ru/paul_blart_meme_templatei83uw.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/4u4ijKR/kitorexepugun.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/maths_number_puzzles_with_answers.pdfIn PDF document text
    • http://fbdirect.site/the_elite_way_tariq_nasheed_free_downloadslcx3.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/wghjfFA/ball_blast_game_app.pdfIn PDF document text
    • http://lodorobirat.22web.org/tawubu.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/super_farmer_rancho_board_game8v6qw.pdfIn PDF document text
    • https://wizenifove.weebly.com/uploads/1/3/4/3/134308138/netovipazib.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
    • http://bemerimaxafup.rf.gd/medicinal_plants_information_in_kannada.pdfIn PDF document text
    • http://pugagewuda.rf.gd/vilareloxa.pdfIn PDF document text
    • http://najepesirezamuz.rf.gd/78475114673.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_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 5384 bytes
SHA-256: c534d2922f62fa58233ed9072df6359cedc18456edb8a3db90ba80210eb5de1b
font_01_sfnt_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 10152 bytes
SHA-256: d6103b908b4dfa7fb668d8519d87a78c6960f7821d90ba88465a2cad0e1dbd44
font_02_sfnt_off00011b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B60 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.