Malicious PDF — malware analysis report

Static analysis result for SHA-256 039ea70274026b0f…

MALICIOUS

PDF

72.5 KB Created: 2021-04-06 23:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 85e855357579647d0b468c8a62f9f1f7 SHA-1: 980c006215c354e83993814ec10ea77bea6cc613 SHA-256: 039ea70274026b0f7b22efdb489c9182eb640766755405c29acef5292d906f3d
166 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SUSPICIOUS_LINK_LURE' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The presence of multiple external URIs, some pointing to disposable hosting, suggests an attempt to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature, likely involving a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/award?keyword=singapore+math+grade+1+worksheets+pdf PDF link annotation
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/18c309fa.pdfIn PDF document text
    • http://price-list.moscow/vampire_diaries_season_8_episode_16_elena_looks_different05ch0.pdfIn PDF document text
    • http://soldatskaya6.ru/ielts_speaking_sample_answers_band_9voaeg.pdfIn PDF document text
    • https://kibutabez.weebly.com/uploads/1/3/4/4/134438896/4cfc6b7409.pdfIn PDF document text
    • http://topfrag.rip/newair_portable_ice_maker_manual0pew5.pdfIn PDF document text
    • http://animoney.xyz/angular_6_radio_button_formcontrolnameq9ys2.pdfIn PDF document text
    • http://shoop-fo.ru/dunapejatekul4zs8p.pdfIn PDF document text
    • https://lonawapusar.weebly.com/uploads/1/3/0/7/130776864/9499587.pdfIn PDF document text
    • http://com-login8.xyz/kenmore_washer_repair_san_diegob1oxe.pdfIn PDF document text
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/wodada_falefedutunuru.pdfIn PDF document text
    • http://mexicotop.xyz/refelodivujoug4aj.pdfIn PDF document text
    • http://save50.pro/ledevura5wfnz.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/sikuva/what_causes_small_bumps_on_hands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95e56f1-c597-4cb7-a046-4dcc5d6d51c2/frequency_analysis_in_simulink.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/nawek.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/57540926562.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/99749932278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d6c2ca-888b-41bd-b3cd-1eca58fea749/mabejetigebafideb.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/bash_script_example_tutorial.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_off0000dcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB2 5736 bytes
SHA-256: 57cfaff441308864a157deba22a12ed8f9d1969aeb6ac9e1250fcea27366fd61
font_01_sfnt_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 10816 bytes
SHA-256: e6aa152a9e4729336a15476a5e92d6530ed6ae245d62698737ff9b6ef974ac0f

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