Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ea4d1d53a4c60e…

MALICIOUS

PDF

81.1 KB Created: 2021-04-05 06:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2001bc21a4f683ba278708208864052c SHA-1: bd402dfb8d14bf02d788ff5e44732eb27cd8a867 SHA-256: 60ea4d1d53a4c60e2a4aff85b258ada27c4f3a3d074b19eeec15a136bfb5b456
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, suggesting the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://mezovuduw.ru/award?keyword=aha+atrial+fibrillation+guidelines+pdf PDF link annotation
    • https://jofogeva.weebly.com/uploads/1/3/4/5/134505403/c3a6a1.pdfIn PDF document text
    • https://cdn.sqhk.co/govupasuti/lojajeh/zataxutatowapoforeraji.pdfIn PDF document text
    • https://cdn.sqhk.co/melobokodijo/gigjejh/14510462134.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/jeUa2ie/27825271735.pdfIn PDF document text
    • http://vanibunogi.iblogger.org/attestation_sur_l_honneur_statut_auto_entrepreneur_pole_emploi.pdfIn PDF document text
    • https://menegelobeka.weebly.com/uploads/1/3/4/9/134903334/8ccec95.pdfIn PDF document text
    • https://cdn.sqhk.co/nukebomevobe/giq0Pif/87934123650.pdfIn PDF document text
    • https://kamararexunazo.weebly.com/uploads/1/3/1/4/131453861/d9fd02688e1cb7.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/aifMqje/my_landmark_employee_login_oracle.pdfIn PDF document text
    • https://selelidenitofek.weebly.com/uploads/1/3/5/3/135345481/vumusolisuni_vutebifapidepu_muvun_tufevufozivax.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/rjjigd7/listen_to_old_time_black_gospel_music.pdfIn PDF document text
    • https://famunekagazata.weebly.com/uploads/1/3/4/4/134463602/3fd36c832e87f.pdfIn PDF document text
    • https://cdn.sqhk.co/zeburozupax/Lheibgg/retejisoduvekutifogub.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/lekeripenaxataje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kexeban.rf.gd/abbreviated_number_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ef992a-7530-48d6-ae10-eb89a511806b/how_to_clean_the_brush_bar_on_a_dyson_dc14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa71c3c2-df3b-40eb-872d-3c1efb47db63/which_is_the_best_chess_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa1056fb-e818-411e-aca8-006a3631f5b3/41660078075.pdfIn PDF document text
    • http://goseletew.epizy.com/corrugated_steel_roofing_sheets_surrey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0dce8c0-8d20-4a36-b74d-d481562809e5/33029725446.pdfIn PDF document text
    • http://gavojomizam.epizy.com/afghan_jalebi_lyrics_video.pdfIn PDF document text
    • http://xejarejunap.rf.gd/u_bahn_berlin_netz.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_off0000fe8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8C 5432 bytes
SHA-256: 7c1738931373f491e98fba914270eb267240fc2713848fb6f5e798877a994d06
font_01_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 11260 bytes
SHA-256: 63aec4a896219d1fa4fc1f744db17b372d90494ce65e44714485b5f11f091c75