Malicious PDF — malware analysis report

Static analysis result for SHA-256 14af707002690d02…

MALICIOUS

PDF

79.5 KB Created: 2021-09-26 16:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4d171adc6f9f631292b7daf54d50464b SHA-1: 365130837b0f74130b37413507d51eb583db7bd3 SHA-256: 14af707002690d028a6c8b9ace8c7ab1ae19c73d8fd9663c2b02c756949d77fa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://coretry.ru/uplcv?utm_term=deep+nostalgia+apk PDF link annotation
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/livozilikotalerutanimip.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/9699229203.pdfIn PDF document text
    • http://malifer.hu/upload/file/777884597.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/75365210749.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-6/20210906185536636152.pdfIn PDF document text
    • https://mar3ol.com/Files/files/18710396076.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/49173510781.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/87444141364.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/46587244423.pdfIn PDF document text
    • https://seerupit.dk/assens/file/73222622606.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161361ac1a61db---36391990719.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/tabimeforukibasixuwefonuf.pdfIn PDF document text
    • https://clubon.top/uploads/files/juviwa.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/tamofuzu.pdfIn PDF document text
    • https://cartolmania.it/file/pefonatofazenur.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/38748690897.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/1000616495.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/vawuw.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/giwulifififo.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/84369765871.pdfIn PDF document text
    • http://annuaire-regional.com/ckfinder/userfiles/files/98337846314.pdfIn PDF document text
    • http://techmechengineers.com/uploads/zimobefadeliposisijofoso.pdfIn PDF document text
    • https://kolkatanagariksammelan.org/ckfinder/userfiles/files/jaxizekofedexus.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2e83da699d7dc787e8b1fa5084969ae/43716198775.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/sikezukubamaletuxareji.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/xusexodabosaziwu.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
font_00_sfnt_off0000b9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E5 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34
font_02_sfnt_off0000e797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 18772 bytes
SHA-256: b05dfa5d5ec1949360859d0b9ed1e6fba13e43ca3e52335313ea28c173156856
font_03_sfnt_off000117fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FD 10420 bytes
SHA-256: 8e349d2ee97e34ee948bd8b27bde1370ea1f7ddf7ad5c335bf1dd47cff885c73