Malicious PDF — malware analysis report

Static analysis result for SHA-256 5302ce5c889d2c5b…

MALICIOUS

PDF

77.3 KB Created: 2021-04-06 00:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 14d7eda7d9a45b78af05a9ede295d1d7 SHA-1: 068d1338767cf642244a57a9b47c918183a53905 SHA-256: 5302ce5c889d2c5ba63cae4fe8277e69f778b8583c56e7d697269cc9c522b30e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm for SEO manipulation or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or trojan delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://kuzutuzo.ru/strik?utm_term=romeo+and+juliet+act+1+scene+2+activities PDF link annotation
    • https://pibowalemarume.weebly.com/uploads/1/3/1/1/131164440/dalox.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/f5c5325375dc23.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/how_to_connect_to_iomega_home_network_drive.pdfIn PDF document text
    • https://renejineb.weebly.com/uploads/1/3/5/3/135322717/xajagabab_jedojepimebix.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/19788974106.pdfIn PDF document text
    • https://dijamolilum.weebly.com/uploads/1/3/5/3/135347404/didudugutufax-vejap-nuteviroripaj-legosela.pdfIn PDF document text
    • http://wanididezaj.getenjoyment.net/vuwowedativavogomibesura.pdfIn PDF document text
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/7931989.pdfIn PDF document text
    • https://nofixemi.weebly.com/uploads/1/3/6/0/136082439/mejawumopopesis-lesiji-rasep.pdfIn PDF document text
    • https://vopupina.weebly.com/uploads/1/3/1/0/131070761/f63e8919.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/xumakomowi/how_do_i_connect_my_kwikset_lock_to_alexa.pdfIn PDF document text
    • https://6f0a1f77-3195-4c90-aae7-8e5805bb56bd.filesusr.com/ugd/f94fd0_b1d2965fc20c40a38513ca70c2a0d22b.pdf?index=trueIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_228ee24910514d918dec5316dd7aa84f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rufonali/52504674786.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/distressor_el8x_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3967fdff-d34b-441e-b5e3-eaf9fd79755e/zexuputozibuboxegiritid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67367bd-ae37-4702-9d2e-bf18685b3b03/627536490.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_ff19c6fbe47648eea19037f888c6a425.pdf?index=trueIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_922f3112f2a442b38ea17efa82369dc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c014f656-8f2d-4469-a8c2-e6a78b080513/90545946875.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/systools_split_merge_tool_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/febukan.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_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 5316 bytes
SHA-256: 45be2c1e6cde80a4d4ebbcb209a4db803d2333290efe3a7e41472b8c1ea97355
font_01_sfnt_off0001031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 10836 bytes
SHA-256: 5e71edcb330087b452f5e7c0bbadcaf959d567279ca349acc29ea09d95e12cd1