Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecc27b110d3b4ef…

MALICIOUS

PDF

177.9 KB Created: 2021-04-23 18:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 615f1a87618fdd893d90386a825ee3bd SHA-1: bdd8d8ce2fb9c7df464d8be8c76642e84df33114 SHA-256: 3ecc27b110d3b4ef022e763ce9a7dc2593f423e0cf1e310745a4c4b84d74e660
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://baarspo.ru/strik?utm_term=philippians+2+strong%2527s+concordance PDF link annotation
    • http://rixorevu.getenjoyment.net/ofac_country_list.pdfIn PDF document text
    • http://famojefefe.iblogger.org/44846806925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_6014deb46efe6.pdfIn PDF document text
    • http://zijafanovidiz.sportsontheweb.net/list_of_formulas_in_strength_of_materials.pdfIn PDF document text
    • http://lakuvekavepoka.iblogger.org/bobuweweruta.pdfIn PDF document text
    • http://drive4mclaneaustell.com/zoxenesoxulasetojuwabauo08s.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/video_killed_the_radio_star_piano.pdfIn PDF document text
    • http://axacheat4.xyz/all_chemistry_formulas_for_jee_mainigjzm.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/used_car_inspection_checklist_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_602d4f04aa14e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374978/normal_6001e42414ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389370/normal_602a7775bf92f.pdfIn PDF document text
    • http://lightly.store/conjuguemos_answer_key_indirect_object_pronouns9az7c.pdfIn PDF document text
    • http://startask.ru/how_to_manage_change_successfully5xkyh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_e0824ff1e5854811a4a6f5a2a6ab468e.pdf?index=trueIn PDF document text
    • http://gofumakexoj.onlinewebshop.net/translating_algebraic_expressions_notes.pdfIn PDF document text
    • https://74bb8966-1fc2-43cb-a641-24c20f380d28.filesusr.com/ugd/84c7b5_a2e2a45b0a544956b6ae4c876f4cf249.pdf?index=trueIn PDF document text
    • http://wonanikapudidak.atwebpages.com/mumanetirupizosekojim.pdfIn PDF document text
    • http://girogabunuxumu.rf.gd/burberry_sales_associate_uniform.pdfIn PDF document text
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_4571a6fc59994f6ea9741a693e1d94c0.pdf?index=trueIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_aba46ee5e9d842eb8580afe8c6f928e7.pdf?index=trueIn PDF document text
    • http://kepofif.onlinewebshop.net/kimesajudolixikegusigi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26C31 5500 bytes
SHA-256: da538477baf1087c103abcb0cf96870b83fd1d6130b29dd131566d27cb1c14db
font_01_sfnt_off00027ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27EE8 10912 bytes
SHA-256: 44275d59fd85adc59674b09672d70d73cc647c7f259dbdfe3e853057df5f05aa
font_02_sfnt_off0002a425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A425 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449