Malicious PDF — malware analysis report

Static analysis result for SHA-256 58176eb465df9157…

MALICIOUS

PDF

85.0 KB Created: 2021-03-09 15:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 0f5f59776fad7836511afeb1a4162fca SHA-1: 39af1615be86c6350e49395fb299ba48f3b754f6 SHA-256: 58176eb465df91574e47b3495db4f3e670078a106a39ad521a1df18bd13f64e4
126 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('pelibifir.ru') that is likely used for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://pelibifir.ru/strik?utm_term=craftsman+multimeter+82082+continuity PDF link annotation
    • http://tarenutufitox.66ghz.com/5680278627.pdfIn PDF document text
    • http://subikizivuwen.22web.org/kreg_bandsaw_fence_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/UFYhgrK/81287319479.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/jjehhhi/free_download_game_world_of_tanks_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/ijgggiX/jonomakewaruwupesokil.pdfIn PDF document text
    • https://tovegema.weebly.com/uploads/1/3/4/5/134505564/fcbc32893d4.pdfIn PDF document text
    • https://nokibuvekunel.weebly.com/uploads/1/3/1/1/131164430/zemifezelidekud_gabifetos_tafoxujedoxax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadegezopofog.rf.gd/bleacher_report_nfl_picks_week_5_2018.pdfIn PDF document text
    • http://lobexot.epizy.com/mastermind_group_confidentiality_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/60733028243.pdfIn PDF document text
    • http://surotatifezuxe.rf.gd/menards_backsplash_sheets.pdfIn PDF document text
    • http://mozogovasopuj.epizy.com/responsive_gallery_css_template.pdfIn PDF document text
    • http://janizopug.epizy.com/bengali_to_english_calendar.pdfIn PDF document text
    • http://kegonen.rf.gd/metodologia_de_la_investigacion_sampieri_5ta_edicion_ao.pdfIn PDF document text
    • http://vegawududabuz.rf.gd/pomefogomuwigu.pdfIn PDF document text
    • http://wonivoxuti.epizy.com/is_trumotion_120_really_120hz.pdfIn PDF document text
    • http://livajurusurex.epizy.com/what_is_rainsford_first_name_in_the_most_dangerous_game.pdfIn PDF document text
    • http://gijuvaginitawaz.epizy.com/letter_writing_in_kannada_formal_and_informal.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/22152231393.pdfIn PDF document text
    • http://bazobajinazar.rf.gd/sesemogimudepi.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_off0001041e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041E 5504 bytes
SHA-256: 92e822eda90d15195923334b04e15350934672f95e0929f6b1fe32effcd707d9
font_01_sfnt_off000116c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C4 13996 bytes
SHA-256: dce598f459da174048ebdee99ef86103764f6c5eb024c5f6c646d2c71aba1693

Open this report in the interactive analyzer, or submit your own file for analysis.