Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62d07ed23ca1cfd…

MALICIOUS

PDF

92.7 KB Created: 2021-03-28 04:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1b22305b79456491a241efdcafad3f3a SHA-1: aad340fceeb437e9aed4e3d13bb4d9b2b21d55f2 SHA-256: b62d07ed23ca1cfde4329bbd96bdf8b28154dff0cf0de29f70ebe3bc5b358733
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/strik?utm_term=what+do+dreams+about+ice+cream+mean In PDF document text
    • http://meetporte.xyz/free_simple_room_rental_agreement_california3p31b.pdfIn PDF document text
    • http://cocobeautybar.ca/85190365457xik5h.pdfIn PDF document text
    • http://tiwilib.iblogger.org/nujoxaxofemitimew.pdfIn PDF document text
    • http://lesantyqas.online/silent_knight_sk-5208_reset_codeaajr4.pdfIn PDF document text
    • http://mexicotop3.xyz/jawokalixicn1mh.pdfIn PDF document text
    • http://fesilax.22web.org/bus_220_timetable.pdfIn PDF document text
    • http://netewe9.xyz/81681575296v4gbo.pdfIn PDF document text
    • http://sovetnik53.ru/how_to_hide_ac_unit_outsidexlujn.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/boluzifudanijeji.pdfIn PDF document text
    • http://remastacer.com/wovawitovapotevotuziger58l06.pdfIn PDF document text
    • http://usene.xyz/samsung_ml-2165w_toner_cartridge_pricev13ew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_2f960f59738c442b9cd01f8ff7a89cdc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/to_be_singular_and_plural_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/bootstrap_4_navbar_css.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/muttley_laugh_ringtone_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/free_online_bejeweled_2_deluxe_no.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/pc_driver_updater_free_full_version.pdfIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_2e6644266a7c4863bb0ed4d9c2092582.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/44794896348.pdfIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_ec31177f55614170aa3a0cb619b43167.pdf?index=trueIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_e69a60ab07954552851f7da0e478024f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/acknowledgement_of_service_form_6_ontario.pdfIn PDF document text
    • http://fabotiwes.rf.gd/blender_cycles_materials_free.pdfIn PDF document text
    • http://besikinugid.epizy.com/bafimofikupagoturedo.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/division_of_fractions_word_problems_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/harbor_breeze_remote_drains_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/kebuzebigunixu.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_117aa4795c4945f693a1004bea0e4cbf.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF1 5300 bytes
SHA-256: cc2922a0f646f2cfcea09e58384946c7c4329fe77df3620fe8c697d280f686c8
font_01_sfnt_off00011fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCD 1796 bytes
SHA-256: dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
font_02_sfnt_off00012857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12857 10828 bytes
SHA-256: 9a36e55e43b903251d4bbf323580d16eb5d7eb8ba1d50dee44da0070c2174b4d
font_03_sfnt_off00014d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D17 16736 bytes
SHA-256: db481dec23a045bea641cbe6c0994acb05e43d0a8450a4262e38a5a843056a02