Malicious PDF — malware analysis report

Static analysis result for SHA-256 570f5b2cfe5e896c…

MALICIOUS

PDF

82.7 KB Created: 2021-05-23 18:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 40b2ef16c3d9404811966c5ca1fd6e33 SHA-1: 22294671568d4b0861777e3bbcb67e88299953b1 SHA-256: 570f5b2cfe5e896c34a7e3ba1afd032898fa315854cd99f6ad6b60d998af55d9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common technique for link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary malicious URL identified is https://gimoguvi.ru/strik?utm_term=los+bere+completo+pdf, which likely serves as a redirector or landing page for a phishing campaign or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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=los+bere+completo+pdf PDF link annotation
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/4160995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5fe6918af2f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460708/normal_605e20d8ea08e.pdfIn PDF document text
    • https://vukekitap.weebly.com/uploads/1/3/1/4/131438073/3459170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_6025dfaa28523.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/zijano_nedijuberubeta_jekago.pdfIn PDF document text
    • https://ralakugifobiw.weebly.com/uploads/1/3/4/5/134589758/e8e7e38a1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489441/normal_5fe3f3a540da3.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/100e0219-4865-43c6-91d9-e4c53767d70f/kejagumevuwukuvoto.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/lujoleba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b74897-75ec-4d5b-b5c0-6fcb7cf95706/how_to_take_a_rule_of_thirds_photo_on_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/sonarqube_jacoco_report-_aggregate.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/rental_move_out_walk_through_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/du_speed_booster_old_version_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db3145e-733b-4f9b-b280-7621ee67aaf5/69548058859.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/85478687836.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/google_maps_live_view_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d859d000-2d97-43f6-9869-7912e4ee6e65/eventide_timefactor_presets_worship.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/elk_m1_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/janakpur_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/wowoneg.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/47426943727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be9974a-4df7-43d7-a378-c763189b8080/38181070580.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/teginoxuramujanadikotozo.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_off00010569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10569 5172 bytes
SHA-256: ce329a778258a3bf43240934bd878ecbd5b4d7c7e6d67cd7862c44558b45de0a
font_01_sfnt_off000116ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EA 11368 bytes
SHA-256: 8f9b8cda9e8e1497215e6c450f931063ac7dcb539d788b21d1d3fe6fde759637

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