Malicious PDF — malware analysis report

Static analysis result for SHA-256 07518aed35be9031…

MALICIOUS

PDF

81.3 KB Created: 2021-03-04 21:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bdedd9c482572ef4bfee6bfe7698610d SHA-1: df50f0d4ed661e9329b3af010ac04b40ba81dcce SHA-256: 07518aed35be90317a1d87f1017acf694f8c0698587d2da75ffd25fcf02e47b1
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 critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains references to account classification, likely a lure to disguise malicious links. The embedded URLs point to domains associated with link farms and disposable hosting, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=clasificacion+de+cuentas+por+tipo+naturaleza+y+saldo PDF link annotation
    • http://helpcenterbusiness.xyz/how_to_use_whirlpool_water_softening_cleanser_formulal1471.pdfIn PDF document text
    • http://shoop-fg.ru/first_aid_booklet_ontariofbzg4.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/dajedemoturiredojuxobazuiwuu.pdfIn PDF document text
    • http://roflan.site/nlp_seduction_phrasesx07uc.pdfIn PDF document text
    • http://barberking.best/bluetooth_pc_driveray71c.pdfIn PDF document text
    • http://help-verification.com/104072383977lo5m.pdfIn PDF document text
    • http://aicberg.net/browser_opens_automatically_androidu22yj.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/ggwyLhe/naughty_boy_ft_beyonce_runnin_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/M9wvgiJ/monster_jam_truck_toys_hot_wheels.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hfNjdhb/magic_pink_piano.pdfIn PDF document text
    • http://ita-bio.fun/linaluzisomububudavajomoko59a.pdfIn PDF document text
    • http://cosmosqrab.online/ample_guitar_m_lite_ii_manualzqqkt.pdfIn PDF document text
    • http://topcreditcheck.info/brandy_bottle_label_template_freez4gcd.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/gqJs2hc/dominos_pizza_near_me_home_delivery_number.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/9WyL8yk/xalosa.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/mLjbz0p/car_driving_school_simulator_download_pc_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_ec0ea3cae7ed47b3ba9eb8cc347a794c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nojemi/vovuximu.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/85023638050.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_93ac49b1326342dcbb9f7a921c9ff0dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/39183791128.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/65057680939.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_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 5204 bytes
SHA-256: 144151b33b1b4253ea5382900004ddffc5e9a3ca8ed39850a78290800ea28665
font_01_sfnt_off00010fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC3 11580 bytes
SHA-256: 9cec8e232eb56656026d62a19ef35980021a66af4ade0174363075ade1913e3c

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