Malicious PDF — malware analysis report

Static analysis result for SHA-256 615da992233a2e5a…

MALICIOUS

PDF

127.1 KB Created: 2021-02-17 21:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 997b3cfe1213e0965e91e872900b120c SHA-1: cdc1319cdd83e02f575aabebdc473a1b2dbfa36f SHA-256: 615da992233a2e5a9ea194707ca3abfe3db937d13e621da8c0653c5444299637
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they have won a prize or are due funds, requiring them to take further action, such as clicking a link. The presence of numerous links, many on disposable hosting, further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wix?keyword=biozone+international+worksheet+answers+2010 PDF link annotation
    • http://vewedomodisex.22web.org/music_sheet_notes_names.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/fjanjdH/1794530710.pdfIn PDF document text
    • https://jorojiwelipevo.weebly.com/uploads/1/3/5/3/135393556/metovaw.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/dnziJ37/nizexosidusinusuxadan.pdfIn PDF document text
    • http://gofipupeseg.22web.org/doodle_god_mod_apk_free.pdfIn PDF document text
    • https://cdn.sqhk.co/texekikevow/ibiithe/fofosutokinurodipore.pdfIn PDF document text
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/putasupaloza-kipot-wurajedegas.pdfIn PDF document text
    • https://jowetirepenu.weebly.com/uploads/1/3/1/3/131383619/refunap-rifelenejuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://surofavuvaxono.epizy.com/cavaleiros_do_zodiaco_dublado_completo_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/96357484643.pdfIn PDF document text
    • http://ditajizuru.rf.gd/adobe_photoshop_actions.pdfIn PDF document text
    • http://nelipofamarul.epizy.com/2521024369.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/8_tab_divider_template_staples.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/46974291886.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000171b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171B1 7084 bytes
SHA-256: 466b94701c246c1b545e4c78e98c5925dbfe5cc76088273adfc840e1565437b9
font_01_sfnt_off000189f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189F8 5140 bytes
SHA-256: 7a0ae8dce14c8a21b85d42c735e957541f4feb2f2507ce759f295b303f009dee
font_02_sfnt_off00019b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B6E 1936 bytes
SHA-256: 106f755927fa619e665f7bf24d6a2529b8845ad7ebe37d4950435c86187055cf
font_03_sfnt_off0001a483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A483 11328 bytes
SHA-256: f8c8a06ae38fc63b332ada063dbdd6b2176961a7a7522f14040661d5b13fdd13
font_04_sfnt_off0001cb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB2C 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_05_sfnt_off0001df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF95 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2