Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7ca9dda7dc16fb…

MALICIOUS

PDF

82.8 KB Created: 2021-08-25 05:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 866a0990127e8b2b1c6f6baa456e9948 SHA-1: 9644068e69b3cb33934de6871e915bebf955bfaa SHA-256: ec7ca9dda7dc16fb376e33817143015571c7a39196707d94ecaf7dd3ad93886b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of external URIs and the compromised CMS upload links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=different+parts+of+the+spine PDF link annotation
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090b72f98159---zugukoxaniriwojoxij.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/4rurkidhrna5tq2hjbi090l29d/pudujaboxexa.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c77723163ae---wipamavodematexufonulu.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/48894200525.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/zudap.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947accaee1e---jemiwulaga.pdfIn PDF document text
    • https://arerp.kr/data/file///somediputeluzewopawelapo.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/vuvugoselosubezesav.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608e108b5584b---zomopesofudezeza.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/t4rrqe6fe1ueppo7rikrpvksi0/kupadusefumufodeludataj.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/70782904664.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/qso2fgd0gbfkk0hgih9ro3oil3/wewoxidime.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a02f354ccdb---gububunusoxosetexizowuwez.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/bosezinufutoj.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/navalivetuwubususopozeva.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/23153658344.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d0db1cf0b---tamupepepaterawexofopu.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/29282567741.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a414ecb12a0---46397405971.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/86595919614.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/43731280617.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/33234090868.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078445e2b030---xojerapirokirapupud.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e95374497ed---16764662847.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/vejolixexuj.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/8l791fajtfci12vl0bp4udug6u/2440191684.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 15788 bytes
SHA-256: e90bfec10dd608dd2b56e5c191dc1a71d89ccdb0062014d36ffae2afd3804e04
font_01_sfnt_off00010dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 10412 bytes
SHA-256: e6489e0e7da34ba1f56d03a5a19047ee133d0af253cc3155487699682396533d
font_02_sfnt_off0001254e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1