Malicious PDF — malware analysis report

Static analysis result for SHA-256 698f388d728687ef…

MALICIOUS

PDF

78.8 KB Created: 2021-09-28 01:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0fdbc9e2edc6e630ec6b55adeee17de8 SHA-1: 6d25a668f29b90bcac3e6b4ed48d315088a67b45 SHA-256: 698f388d728687ef6ccca42cb167a044186aa67f04b7e060be7b53f88b684061
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm on disposable hosting, with numerous external URIs pointing to potentially malicious content. The embedded URLs suggest an attempt to redirect users to external sites for further exploitation, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4f657d59902503e1b98b3ede10d034d1/nirazelekizogedotuvas.pdf In PDF document text
    • http://we-women.de/default/files/uploads/file/futepewakelofepax.pdfIn PDF document text
    • https://zooiguana.pl/app/webroot/media/files/babufexalotezojeriropedot.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/kebised.pdfIn PDF document text
    • https://eliteprotectiveservices.net/ckfinder/userfiles/files/36138706300.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/xazitepesawojawegubep.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/mamelilapixeja.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/sibonojemevojunerejow.pdfIn PDF document text
    • http://ceroki.com/image/files/fekolemonawadazujaronemas.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/bujemaxukejevolakunaduf.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/worofalabudowil.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/rolovalitufidodudofa.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/tatunewibusaxaloje.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/disigavugekak.pdfIn PDF document text
    • https://brakos.it/file/vipano.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/vedif.pdfIn PDF document text
    • http://balalajka.nu/media/gumewilokabopuxabemusoka.pdfIn PDF document text
    • https://rapn.ru/ckfinder/userfiles/files/diligabokazin.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/53340507546.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/47790473199.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109201206567561.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/10632791460.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/29118776710.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/18710694234.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/wegag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=adobe+lightroom+mobile+apkPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E4 10780 bytes
SHA-256: 8b74eee3f7486806dbfe717139a8a0a6f68c09b0f75e8100dae87141490af8db
font_01_sfnt_off0000d043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD043 18312 bytes
SHA-256: c53af81ef1be01bb6cf622a5c50d22e279a562ac554364ed52e4145b702dc7c4
font_02_sfnt_off0000fefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001170e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170E 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34