Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf5a5011d0cae1a…

MALICIOUS

PDF

82.3 KB Created: 2021-04-01 08:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8b9f29883725de48645a8203cc92d19c SHA-1: b86ae6da788ae1c70f487bd7f92c47ce49aa7d78 SHA-256: 4cf5a5011d0cae1a747e2a14d14d987ef20afd571e49c7aa468e7c757998553b
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains multiple suspicious links, including one pointing to 'http://loginwithfb.site/', which is likely intended to deceive the user. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the presence of external URIs and the phishing lure suggest an attempt to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://nipisod.ru/strik?utm_term=why+does+my+furnace+not+blow+heat PDF link annotation
    • http://coolvdomaion.online/30981307940j6bo0.pdfIn PDF document text
    • https://cdn.sqhk.co/xekufaledu/jiicgiH/converse_platform_sneakers_canada.pdfIn PDF document text
    • http://fasad-dom.site/kaplan_dat_review_notess2x5g.pdfIn PDF document text
    • http://bagajuz.iblogger.org/lixorodowupunotapix.pdfIn PDF document text
    • http://loginwithfb.site/how_to_turn_off_maintenance_light_2005_honda_civic0klgz.pdfIn PDF document text
    • https://cdn.sqhk.co/fexiseme/ggegigg/7611990879.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/hcjf83b/84100491597.pdfIn PDF document text
    • http://it50off.pro/when_will_dark_series_endxzcrd.pdfIn PDF document text
    • http://jubosetitav.iblogger.org/43426129991.pdfIn PDF document text
    • http://putuvuki.22web.org/download_lagu_eclipse_ncs_mp3_terbaru.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/aha3AGW/nedajub.pdfIn PDF document text
    • http://eduha.online/3176729140rx16z.pdfIn PDF document text
    • http://maslovauto.ru/70853749810dra2g.pdfIn PDF document text
    • https://cdn.sqhk.co/dedatemaran/t9Jnhi8/types_of_anemias.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vovuzize/apprendre_a_dessiner_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/latest_bluetooth_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/baby_doll_song_3gp_video.pdfIn PDF document text
    • http://xavumefutej.rf.gd/pablo_neruda_poem_poetry_in_malayalam.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/6770156315.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/burger_king_vegan_impossible_whopper_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/rolled_candles_beeswax_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/96270322269.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/kelikunize.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/free_video_maker_software_for_pc_without_watermark.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/burger_king_hiring_age_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/novulupetikawokurudinuvak.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_off0000ec7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7E 5608 bytes
SHA-256: 9e9c590d674e1c28dcf5081bed56741cd6a36d1e7a3d6e1c5dc9e5cffba2db35
font_01_sfnt_off0000ff7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 11120 bytes
SHA-256: 1e8dc48ebb367405267fedaeb2be0df689910f11fde6cef92ddb44e5744c14dd
font_02_sfnt_off000125c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C9 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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