Malicious PDF — malware analysis report

Static analysis result for SHA-256 719ea66d354a54cb…

MALICIOUS

PDF

75.3 KB Created: 2021-06-04 01:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 210a91fb78ae90b490a954afe180a152 SHA-1: da0e0556ccee16190394e45b6bfbca2eac6ae517 SHA-256: 719ea66d354a54cb081a127b25a04d5b5d3935cb2d571ede129f5460fbb78121
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam and phishing. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into believing they are receiving a parcel or prize, which is a form of advance-fee fraud. While no scripts were explicitly extracted, the presence of PDF_URI and embedded URLs suggests an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://gimoguvi.ru/123?utm_term=sunnyside+muriatic+acid+sds+sheets
    • https://purapunebofo.weebly.com/uploads/1/3/4/8/134888030/zowedetapefegexogom.pdf
    • https://tofikopu.weebly.com/uploads/1/3/1/3/131381225/fudaraseboxinag_pesoxusaxaxixew_kosiravum_fojuralifukam.pdf
    • https://jojurofi.weebly.com/uploads/1/3/4/6/134666092/duboluduro_zisukav_merupifegimop_tapasimuditunod.pdf
    • https://xaxidotuviw.weebly.com/uploads/1/3/0/9/130968933/9931954.pdf
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/95796d2bfdc56be.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/622f8f6d-15a8-4a99-83cb-8bdb7e4d05c2/what_does_the_doctor_say_lady_macbeth_needs.pdf
    • http://natizasex.pbworks.com/w/file/fetch/144578970/riseginedemodimika.pdf
    • https://uploads.strikinglycdn.com/files/013ebb0d-50fe-48a7-a728-aaa251493285/19078383797.pdf
    • https://uploads.strikinglycdn.com/files/aa2f324d-cf78-46dd-8d62-f2af2e578475/what_does_no_codes_stored_in_module_mean.pdf
    • https://uploads.strikinglycdn.com/files/11d6a9cc-c203-4ef2-a71f-5d1626d9589e/como_detectar_deficit_de_atencion_en_bebes.pdf
    • http://tereburokofe.pbworks.com/f/44061669464.pdf
    • https://uploads.strikinglycdn.com/files/969d3b3e-6952-4b75-a621-beaae14657bf/the_rational_male_book_review.pdf
    • https://uploads.strikinglycdn.com/files/3b2d302c-9b76-4627-9a50-ef810331aa68/sexobirixa.pdf
    • https://uploads.strikinglycdn.com/files/821cbd60-f2e7-48f7-8153-d3e372243d1c/tin_tin_restaurant_austin.pdf
    • https://uploads.strikinglycdn.com/files/7dce99f9-3b45-4f5b-b89b-433f93526ecc/94798539920.pdf
    • https://uploads.strikinglycdn.com/files/321887f2-39f9-438a-b3f9-2a1c33f77427/harry_potter_characters_patronus_list.pdf
    • https://uploads.strikinglycdn.com/files/b2b559c6-d06c-4c4e-8a83-53e2281570d6/what_does_a_global_marketing_manager_do.pdf
    • https://uploads.strikinglycdn.com/files/8f3b61c6-06f4-4635-a02a-ed19f136d684/wowepen.pdf
    • http://wixugigir.pbworks.com/w/file/fetch/144578913/94801960163.pdf
    • https://uploads.strikinglycdn.com/files/5e4e53a1-ebdc-40b8-8966-5a786c2f9365/old_yeller_ending_scene.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e97f.bin
d4ce31be911fd4460829a112765d276e7a81f7fa337a2098f40bd4d878eb4bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE97F 5352 bytes
font_01_sfnt_off0000fb8b.bin
ef8fedc24db9100453164620e55ddd6892748e0b3b6d4fcaaa94f0f2b761ac32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8B 10664 bytes

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