Malicious PDF — malware analysis report

Static analysis result for SHA-256 491d2fe0790ca4be…

MALICIOUS

PDF

83.7 KB Created: 2021-09-09 22:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4b515d71fb1e12d485dc60cf190f7b00 SHA-1: 5bc5dee6a141f9e8f7d3a25112909fafe0903d4f SHA-256: 491d2fe0790ca4bed87147eb83bda3d10dc2f0cb77e0e31c9f53a431ced32154
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/jojotagapelididopuduwos.pdf In PDF document text
    • https://noddy.nu/images/file/27009655307.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/loluxumogise.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/totukifurepelak.pdfIn PDF document text
    • http://vhshf.de/File/97934881854.pdfIn PDF document text
    • https://lordoptika.hu/files/files/88950922846.pdfIn PDF document text
    • http://szcftz.com/upload/41463182419.pdfIn PDF document text
    • http://demo755.webbazaar.com/uploads/42420840139.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/xigududogi.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/webomatodarapovatoritad.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/nivususidejunazutu.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/96934a40042ce626c39ee87c5ce68b53/3512182694.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323eea66cbf---47858092994.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/30936700551.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/gujebavizobisirizodi.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/gixixomaremopesolofogo.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/29011610138.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/47724858040.pdfIn PDF document text
    • https://maturana.cl/upload/file/lutiv.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/febalelegusukujefanobobe.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/befifil.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/49555165435.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/kirevonumizubitagilegekom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=hillside+drive+racing+mod+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E3 10908 bytes
SHA-256: 08fcb8554a10fdb2aa3d0f99e08d597387b31a9b1e6c0cbb4fd6d1338c31e597
font_01_sfnt_off0000fcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 17288 bytes
SHA-256: 2d0af49c250c9a3d92974958357265f8d9a066cc0d5468e4e9da231352c30790
font_02_sfnt_off0001294d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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