Malicious PDF — malware analysis report

Static analysis result for SHA-256 861da17a9319859e…

MALICIOUS

PDF

84.0 KB Created: 2021-03-12 04:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 60d1e3e95b788c8f5a78c4bb3b3230a8 SHA-1: 2e4e6c6545f6d61ce605f21777b7199ef9393b8f SHA-256: 861da17a9319859e03a9e0157d6dc4f1a75db49ad586b0695a5dba7bb5289283
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=dewalt+dw7451+manual PDF link annotation
    • https://magiriwumup.weebly.com/uploads/1/3/4/8/134866691/6107865.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/aula_internacional_1_nueva_edicion_ebook.pdfIn PDF document text
    • http://mandarin-fruit.space/how_to_identify_inferential_statisticsgyue2.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/dopokodozus19ggm.pdfIn PDF document text
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/643aaac.pdfIn PDF document text
    • http://allieshouseofhope.com/genie_2024_set_limitsq30d9.pdfIn PDF document text
    • https://rejudizik.weebly.com/uploads/1/3/4/7/134701546/zusuvufugiwuzipaw.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/52359146678.pdfIn PDF document text
    • http://soldatskaya6.ru/dailymotion_no_ads_apkmkbv8.pdfIn PDF document text
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/b4a29b1.pdfIn PDF document text
    • http://snapchat-alert.com/81285465214g9j7q.pdfIn PDF document text
    • http://doxalasi.mywebcommunity.org/91974194296.pdfIn PDF document text
    • http://hookup682.site/bovafojedafaxavazenami9wni1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bexukavibume.myartsonline.com/65904145757.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_4962e5ac45a44b6e8a60be64b761a173.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_7a814242230147dc899ff0e97d48f15f.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_9c0a2ca3d6b44df2a5a64ef886687d57.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_8d34ca0c7f3b49d7a113b75b49d02b2e.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_5d32a19406b542af954bb52b1cc50e01.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 4856 bytes
SHA-256: 1d61c48d05336fc9df36280d0ef5995a761de11caa282fc6b7d65750bb3fb4f1
font_01_sfnt_off00010acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACB 11896 bytes
SHA-256: 58b0ce3bbaeb903f7e10b9429a5feea982b5f5eddc0c68a5db0aabca06209510
font_02_sfnt_off00013351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13351 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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