Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbabfc032363d6c0…

MALICIOUS

PDF

79.0 KB Created: 2021-09-11 06:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 714a350fa187d31aee0d3848beb45fa4 SHA-1: 05860d1ba7f3c17feff330f44ca46af34ba832ab SHA-256: bbabfc032363d6c07cbdab12e04c28e6243c802c639c44f6af3d1931486871b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically noted as a 'link farm on disposable hosting', suggesting a phishing or malware distribution campaign. The presence of many distinct hosts and UTM parameters further supports this. No scripts were extracted, but the primary attack vector appears to be directing users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://allytemp.ru/uplcv?utm_term=android+recovery+mode+3e PDF link annotation
    • http://h-st.nl/bestanden/files/71577637605.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/20210905082802234565.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/fewurozomega.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/69163408168.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/bokuraniseludabal.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/14303358564.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/12500189510.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/goruzefure.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/dipozoligo.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/9900381553.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/70814874823.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/sovakegepelu.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/13722109105.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/22368622209.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/jupabinovetuleramepuguxi.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/rilejazixupewefoled.pdfIn PDF document text
    • https://alev.az/userfiles/file/16021837831.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/58953829810.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3f0417e9a---70027273620.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/peworelekemufiweko.pdfIn PDF document text
    • http://marketingnews.fr/images/file/farotu.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/95720640512.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210910_073215.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000100a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x100A6 16244 bytes
SHA-256: 9229bde5e3614c940ebb387a6affb910e6b09cdb82f6b0ab59768fbd23138caf
font_00_sfnt_off0000b571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD83 20452 bytes
SHA-256: a3cf9c95ffd857b3ec5cff4cff802c144b2b0c829a0381bf4b91a24b20975e9e
font_03_sfnt_off00011697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11697 10392 bytes
SHA-256: 97e5076c2dc77a5b49c38bde68e5479cdba6b2209e882968e09b42aee97586de

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