Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62f8f1f18ef1515…

MALICIOUS

PDF

85.4 KB Created: 2021-03-09 16:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 124768c143ca330f6009b44e5d25bea3 SHA-1: ef4ed0535fae24288093372f11b5cef974cf78a7 SHA-256: f62f8f1f18ef151537a7394d2a64acc831c56144a91538fe7f32bbc4532579f8
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains, flagged as a link farm and detected as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to 'Burano map pdf'. The presence of external URIs indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://jumiwimov.ru/award?keyword=burano+map+pdf PDF link annotation
    • http://sacredname.ru/suppository_applicator_how_to_usean1hg.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/86669577540.pdfIn PDF document text
    • http://enots.space/twilight_midnight_sun_movie_2020_release_date_in_india1hcjf.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/84301548444.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/setomubapoxe.pdfIn PDF document text
    • http://store50off.info/livininekolekanavasonexcb.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/sekaseguzikelepudopoko.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/harry_potter_and_the_half_blood_prince_trailer_2l6xe5.pdfIn PDF document text
    • http://bluebadge-support.com/lifefeseuuvwh.pdfIn PDF document text
    • http://moneyindia.site/xivodorozokuwevyd70.pdfIn PDF document text
    • http://teksalle.xyz/catalogo_avon_campaa_15_2018gg9xk.pdfIn PDF document text
    • http://dronextactical.xyz/mundos_en_colision_immanuel_velikovsky9rvs5.pdfIn PDF document text
    • http://sunshop.pro/givexokexidopezizedok3bb1.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/sitenovigeperojenobiloka.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/probability_practice_problems_with_answers.pdfIn PDF document text
    • http://mon-fortuneo.best/pixoruxirakzuxh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_3c213affa2474e2aa49e240c940f0922.pdf?index=trueIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_b538fcf0ee524444828996974b65d438.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezutu/85446525651.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/metro_2033_chapter_4_trolley_combat.pdfIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_d496e1705c9c4f249c45c53ffab46a91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/hazira_port_to_mundra_port_distance_by_sea.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/chloroform_used_in_crime.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/8262436038.pdfIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_b4ef11d3df2c46cf82c2ede60098b090.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_a751016a10eb47c18070644acdc1e76c.pdf?index=trueIn 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_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 5028 bytes
SHA-256: e916d34203ee45d766967baf9e52e148177b61113d0f9fb4850075e53a3cfc85
font_01_sfnt_off00010bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEF 10500 bytes
SHA-256: bcde4dc489e608aa13e1411d09c23461d534b4012dd469b7aba243d6253ed45c
font_02_sfnt_off00012fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEC 16992 bytes
SHA-256: cb98acbc37a489d4a52bc404a6012168ef93dfdca55429facd9c4ccba0b547db