Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad897a7bdadb23a…

MALICIOUS

PDF

84.4 KB Created: 2021-09-17 08:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5a7354b75e64e98a2e58c303a2afedb7 SHA-1: 3d128fc1d127a1ca4554518fca5fc82f0bb9bbe9 SHA-256: 6ad897a7bdadb23acbe4d8b19c20f676b22d0076e1a0b7fcf3c0f6e75893449c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one specific URL related to 'valorant prepaid card codes generator' which suggests a phishing or scam lure. The PDF structure itself is also noted as a link farm, indicating a potential SEO manipulation or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://btsoft.vn/uploads/files/xowedogapawitup.pdf In PDF document text
    • http://libron.pl/fckupload/assets/file/52852732136.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/paxepusi.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/fenowuwi.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/83252149650.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/40260572897.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/muvoro.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109170223452573.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/vovava.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/54717317583.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/jiwudajaxamuzajewaba.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/xalajunixutoriza.pdfIn PDF document text
    • http://npas.ru/pic/file/bigefapagafabekologe.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/78211206048.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/paluvexubozuvebewuko.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/37586691596.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/sojuvavev.pdfIn PDF document text
    • https://halkum.rs/files/lezulivilovudeb.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/14993201659.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0736e7756---wubexubetumimefute.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/69100303282.pdfIn PDF document text
    • http://belovosushi.ru/files/fakenamonoworivud.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-9/20210909202223693953.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210917_052713_8819.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/sejipetizujiso.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/xogajoje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=valorant+prepaid+card+codes+generatorPDF link annotation
    • 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_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 17984 bytes
SHA-256: 2c6433784e9f36339a214568c85db72bfa1a8c434e88802e575d6aa6ff4a8a3c
font_01_sfnt_off00011372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11372 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B89 10660 bytes
SHA-256: 19a9770ffa7a739f855a56e10a02c4659bba895bf1984bf99d710fb98e5710d6

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