Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef87e9223c8a8a58…

MALICIOUS

PDF

86.8 KB Created: 2021-05-10 03:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 075c1f6b68fe773f7072cda8dff30755 SHA-1: b86310695d3e22f4f73c11ae513b95affcc99ae0 SHA-256: ef87e9223c8a8a58af03049acc97ec317695598034650d9191f4412b6b1e13ab
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9993

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/strik?utm_term=osac+el+salvador+crime+and+safety+report PDF link annotation
    • http://form-lnstagramverificationbadge.com/how_to_calculate_lattice_energy_from_born_haber_cycleh0te6.pdfIn PDF document text
    • http://tryse.xyz/chicken_wings_nutritional_informationzcgir.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/asp_net_mvc_3_tools_update_download.pdfIn PDF document text
    • http://norikaloro.mywebcommunity.org/are_muscular_arms_attractive.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/4409199152.pdfIn PDF document text
    • http://community-day.ru/how_to_connect_bose_companion_20_speakers_to_computergm6ou.pdfIn PDF document text
    • http://igbusinessabouthelp.com/99244530434i21z.pdfIn PDF document text
    • http://gazagidumow.mygamesonline.org/logic_pro_10.1_system_requirements.pdfIn PDF document text
    • http://natnat.fun/6133768820022vsq.pdfIn PDF document text
    • http://remont-kholodilnikov.website/neverwinter_nights_2_cd_key_generator2gopr.pdfIn PDF document text
    • http://dkblogin-de.best/rewusojoxalepijidukenudavg1id.pdfIn PDF document text
    • http://detonic-ro.website/10109326659mqijv.pdfIn PDF document text
    • http://jebonefawudo.sportsontheweb.net/adda247_banking_awareness_ebook.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/jame_abwab_us_sarf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/lakozezodasus.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/meade_starfinder_114eq-dh4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5495f7b7-9ffc-479e-8d66-9170c51f37ca/56221880223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc33e59-a0a6-47b6-92b6-b316c996d08c/i_pilot_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737325c3-003e-4d8a-8f82-fd5a92379213/54695739824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8c834e-6341-4a17-935b-1e54fbb12672/gawamipotovidugisolawikar.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/zegafevigib.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/vikirusewukise.pdfIn PDF document text
    • http://xedemigu.atwebpages.com/37059763462.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/editable_bingo_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20e68dbc-b3d1-486c-b27f-7598de4b959d/no_game_no_life_light_novel_volume_4.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 5488 bytes
SHA-256: 16be130b81808a1ce2fb523dc923f3a7d8bb5dc0cdf6050e0fe44c36224372e7
font_01_sfnt_off00012a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A63 10356 bytes
SHA-256: 805c2037b2ab234bf104bbc3b6a2fda573c678e1913ff7ede3478111aad87bf6