Malicious PDF — malware analysis report

Static analysis result for SHA-256 db33a46d29cfe33c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-14 23:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2e25e48c3225d1ae92cb2430dccd2713 SHA-1: 5b607794b4937538e0903c40b46f90dc8cc94ddb SHA-256: db33a46d29cfe33ce69bc1b039adb61a353e18870f9ab0698aa27bc9e3bb1332
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains or link farms, indicating a strong intent to redirect users to potentially harmful sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=android+tv+box+price+bd PDF link annotation
    • https://www.jakketoes.be/ckfinder/userfiles/files/sizarabenelezixuwerunozuj.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/4848250361.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/pojagiz.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202109031357083761.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/11469532304.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/52859942916.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/sedem.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/rimuroxijiwikolikibe.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/66685020193.pdfIn PDF document text
    • https://fivetc.net/uploads/files/37194039883.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/bubupudisudofaki.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/titig.pdfIn PDF document text
    • https://anfauglir.com/images/file/bigotirifafatari.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/kabujebomu.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/jikituzufinoviseb.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/didakopigava.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/83371477015.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/57954262059.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/74651772381.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/38418617998.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/45025062932.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/12970235866136859ea57c3.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45979322717.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/fovuwipa.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_off0000df5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 18148 bytes
SHA-256: 352391bd5423baa63ddc610439d52b81f6f30960936639b0a5c08efc0a4b9db4
font_02_sfnt_off000126ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AD 10420 bytes
SHA-256: 3cedfb46de7af38ab04b6306985976fb6bc822ea0d55faae212052c96b2377c4

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