Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab67ad9094e482a8…

MALICIOUS

PDF

84.9 KB Created: 2021-09-17 06:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 13021cd083facf32a570e6c6156796a6 SHA-1: 052bc02ee716801e79e245bc0a09808e1a506a1b SHA-256: ab67ad9094e482a850071e261c45e9bc000f875857ee41940906c2daa4ba9510
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or malware distribution. The presence of these links suggests an attempt to redirect users to malicious content, aligning with spearphishing attachment techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://nhanloc.net/userfiles/file/15706795824.pdf In PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/topasu.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/bekisikaloni.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/41065419379.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/logaxodobobiz.pdfIn PDF document text
    • https://datenglagi.com/contents/files/26023512876.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/bolasofamotifelusokutuju.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/74868695769.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/bfecbde504678a2ba48056769550ce6c/wisemukijixurusapuve.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/vexuguzotulekagawar.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/mezomajutulinomemerunib.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/23389537199.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/50520319185.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/givozugar.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/xikuwi.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/774279704.pdfIn PDF document text
    • http://kmsenior.org/file/files/muxisizunika.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/jowujikixepuderur.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/45736965412.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/fisajisekadevobin.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/69577331554.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/retubirokapon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=slug+it+out+2+hack+version+downloadPDF 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_off0000dcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDB 20924 bytes
SHA-256: f67bf6b55dde5a1f0cd5640448abe7d408dae6b05f65a2b5b3511463bd98e93a
font_01_sfnt_off00011432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11432 11188 bytes
SHA-256: a4eed72ec132acee0f3502d1ca8de6602ef5aa50c447a9b15632d9eec0488f52
font_02_sfnt_off00012e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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