Malicious PDF — malware analysis report

Static analysis result for SHA-256 70019e01f54ff700…

MALICIOUS

PDF

86.1 KB Created: 2021-04-06 19:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0ffa1fd0fe65ffdcbcaa0273f92bf491 SHA-1: 3dd4c8562835274eadec5c5e73de9bfc8dbb2879 SHA-256: 70019e01f54ff7008780f015ace2570a3466c82036e9f8975baaecc580baace6
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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.
  • 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.
  • 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://jacksth.ru/strik?utm_term=mecanica+vectorial+para+ingenieros+estatica+10+edicion+pdf+descargar PDF link annotation
    • https://fagedudadisex.weebly.com/uploads/1/3/0/8/130874641/fefukitetofibapijo.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/we_by_yevgeny_zamyatin_setting.pdfIn PDF document text
    • http://gapuzenum.22web.org/zefijugewatituxogitupob.pdfIn PDF document text
    • https://rukinuzozumar.weebly.com/uploads/1/3/4/0/134012371/guwobuz_kodabatubupida_keranizuguxupet_kulobugo.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/hfwi4pu/vodafone_yan_mda_ev_internet_hesap_ekleme.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/giha8ia/craftsman_gold_6._25_lawn_mower_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/kjdUhj9/23465161132.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/kekegirufanekav.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/OW3ichj/30830414193.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/lamorej.pdfIn PDF document text
    • http://noluwokufemifoz.22web.org/cathode_ray_oscilloscope_cro.pdfIn PDF document text
    • https://zomubotedop.weebly.com/uploads/1/3/0/8/130873922/4c901d.pdfIn PDF document text
    • https://cdn.sqhk.co/juzilolawu/v8Ahbhe/nusovot.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/cjegfjj/blender_sculpt_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/bibikodazit/ihggige/82542508944.pdfIn PDF document text
    • https://cdn.sqhk.co/zisenusaf/ghdDrgd/zibovifepofufubemuj.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/explain_the_purpose_of_writing_a_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipeporo.onlinewebshop.net/blank_yardage_book_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fde44ef-c146-4737-b924-974376185ca0/the_revenant_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffde4f67-845c-4638-9967-ac4b989d9282/stand_up_for_what_you_believe_meaning_in_english.pdfIn PDF document text
    • http://doputokodopesib.rf.gd/blender_game_engine_book.pdfIn PDF document text
    • http://gedonisezif.epizy.com/powerpoint_templates_medical_records.pdfIn PDF document text
    • http://rukodulaban.epizy.com/58182942538.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 5584 bytes
SHA-256: 84e27deffe953aa6c82203474c9240e6a6a526d7d9216700322d48bdc8d25d37
font_01_sfnt_off00010591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10591 2044 bytes
SHA-256: 7819ef1de3348ad227e302ba7a5900f372fd4440a21f482bbf68fb1bc67eb97d
font_02_sfnt_off00010efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFE 10772 bytes
SHA-256: 0f2445433bf7dcf966be90e6481abbc5091aacc9b9fc7091f6b8a6457661d0e9
font_03_sfnt_off000133f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F0 16260 bytes
SHA-256: 1b3a7c1b7bc451495b69e6c2dc925dfa634ebf3cd17a1c22ac82dde46aeedc8f

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