Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d4a49b024acec1…

MALICIOUS

PDF

80.3 KB Created: 2021-03-14 18:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 02580cae80c6f85d66490af25b24cc97 SHA-1: b9c31bde856fb3491e444248337342793910793e SHA-256: 48d4a49b024acec1fffecb6973c3a1355df0c33e66724ef0cb20788a7f2afb2d
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, likely to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=which+2+bones+form+the+hard+palate PDF link annotation
    • http://nakrutkavk.site/pavogulujunudekonubuzsghie.pdfIn PDF document text
    • https://cdn.sqhk.co/gawarebadal/dUijuCq/fast_racing_neo_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/gonuromabime/ffkiiif/ballroom_dancing_sydney_north_shore.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/qCha3hj/lujusokozus.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/43789763388x088g.pdfIn PDF document text
    • http://csxmoney.info/2003_honda_accord_service_manualg3txf.pdfIn PDF document text
    • http://buybritishcat.com/pdf_english_grammar_in_use_raymond_murphyko139.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/0hcJPhc/lifonugonezasatubovu.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/business_partnership_agreement_roles_and_responsibilities.pdfIn PDF document text
    • http://olymp-trade.top/how_s_life_funny_answersk6ghz.pdfIn PDF document text
    • http://mabay.fun/baby_guinea_pig_care_sheetyqkpa.pdfIn PDF document text
    • http://yesitalia.fun/wufalevuxedizemofikij0ev75.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/bifijQE/mother_earth_news_gift_subscription.pdfIn PDF document text
    • http://damvglaz1.xyz/81766875851gh48q.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/j5ezDz2/crossword_mysteries_episode_guide.pdfIn PDF document text
    • http://esplus.pro/bengali_movie_villain_videopexd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijuvunote.onlinewebshop.net/nukaxezebafivulokod.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/body_reset_diet_grocery_list.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_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 5680 bytes
SHA-256: fb59874cc8e262b22159ea4d7e93475ec1d1638e663e0895bf5bf9a6cc5adec8
font_01_sfnt_off0001109f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 10368 bytes
SHA-256: 1e743bbeeb2f793795cd80465920993f17cad5a810c08d72b6010ee15095d12f

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