Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1d7301648d4e89…

MALICIOUS

PDF

83.7 KB Created: 2021-03-09 06:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0dfd11e632be8cd42688972c59cd79b1 SHA-1: 3151ddaf8283a61997b83814e8c35b5e9159c3f1 SHA-256: da1d7301648d4e8958be8160e12e079758034448387d0231223c1e591bad865a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains embedded URLs and heuristics indicate it functions as a link farm, with one URL specifically mentioning a 'docking station setup' lure. The presence of ML and ClamAV detections, along with the 'SE_DOWNLOAD_BUTTON' heuristic, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and detected URLs point to a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/strik?utm_term=hp+ultraslim+docking+station+dual+monitor+setup PDF link annotation
    • https://cdn.sqhk.co/zoluxoni/VijKXpd/creative_destruction_player_stats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_6023e8125773b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fd67dc721c41.pdfIn PDF document text
    • https://cdn.sqhk.co/zivugeri/0icZgdv/48166680867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_600a7c2f5e117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_60111cc120581.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/7m7hhtF/tinefumojotomepobejesema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501231/normal_6015fedb0c626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_60062bd75339b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446773/normal_6038383bcce70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476302/normal_5fcbe21e6a4d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/101050da-5d54-46d0-99a3-eb788eabe904/78370993797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2865450b-8932-47ea-a85a-d426f4c040b9/61735148500.pdfIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_91bc0eb91495427a9a3467d781d40c83.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/rirefogitetuval.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/annamayya_songs_zip_file.pdfIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_2260296a0e1448ddb3e013bd524d590a.pdf?index=trueIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_7f8873af515e46bf8bda30e885485241.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c094c8b0-42c3-43af-8972-51a5ab1aa63c/derechos_humanos_en_mxico.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_da896e045c3d415e8f741867e7177f63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/kagiwi.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_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 5420 bytes
SHA-256: 0b0eadcbe2a6a52f9b04e3dd650396619d9067a8f56ffdca573756b2cb756864
font_01_sfnt_off0001192b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192B 11896 bytes
SHA-256: 5e34b1d356c3950b4aa745320eff265d3948a54c08f764ff47ffd63fef7c6ce3