Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2f018ab0576e5a…

MALICIOUS

PDF

80.3 KB Created: 2021-02-24 23:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f0f5e15b29a1e69697177697c06a7591 SHA-1: 9335c34059e6bd199840df62ffd84a09dd95386e SHA-256: 4d2f018ab0576e5a69d3c63941eab988c70d69d481543c99d7eac82f319e6b1d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and utilize UTM parameters, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, indicates a lure related to a game guide, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/strik?utm_term=mhw+arena+quest+8+guide PDF link annotation
    • http://tameenegypt.com/download_game_moto_traffic_rider_2_mod_apkmaibc.pdfIn PDF document text
    • http://save50.pro/charlie_malayalam_movie_free_in_tamilrockers8dtu1.pdfIn PDF document text
    • http://fbcopyright-center.com/redmi_airdots_driver_windows_10wx33z.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/matotelutedogekawofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456140/normal_5fdc4dba94eff.pdfIn PDF document text
    • http://sikagez.22web.org/activity_1_empathize_with_your_enemy_answers.pdfIn PDF document text
    • http://ejinaya.com/maus_2_spiegelmang1hw3.pdfIn PDF document text
    • http://idealica-it.website/gipatepugoxameva3dp9w.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/gudujebexabebel.pdfIn PDF document text
    • http://tiktokhd.design/uke_tabs_steven_universewcsfr.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/work_from_home_software_development_jobs_in_bangalore.pdfIn PDF document text
    • http://indohealth365.online/linkers_in_english_worksheetb7b9f.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/munatunetejipoxared.pdfIn PDF document text
    • http://preplafond.xyz/glynis_has_your_numberpyo2h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_5fdb836b1f373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368477/normal_5fc816733f701.pdfIn PDF document text
    • http://pressit.space/pop_up_card_mechanismssiwhp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tejozusob.rf.gd/42560169654.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/kesaguxujorimegozasa.pdfIn PDF document text
    • http://vufagozujidivu.epizy.com/vasiputedujagaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/certificate_of_origin_template_dhl.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/xovosugit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66D 5472 bytes
SHA-256: 0065f5a827e6070ffb455d9bfd7c904424fdda87388ed78be6f2e82e2c7ef447
font_01_sfnt_off0000f914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF914 10548 bytes
SHA-256: 589e0e2f769e6dfcb71a76d93dcecb7ccf1853286973d638bb9b3b75575e5b98
font_02_sfnt_off00011d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4B 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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