Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d336d0f8d76a738…

MALICIOUS

PDF

81.6 KB Created: 2021-04-05 00:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1df38ad4427bfdadedae6ab6d90fe18e SHA-1: 104a6ac78c8f5c752eff8c8d457eef3e4319d559 SHA-256: 8d336d0f8d76a7385a92a22a93ce4437d5038b527f6e179d8f6f80b22021fe71
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm, likely to manipulate search engine results or direct users to malicious sites. The embedded URL 'https://jottigo.ru/strik?utm_term=how+to+use+reverse+psychology+to+get+a+man+back' is a primary indicator of the lure used.

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 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://jottigo.ru/strik?utm_term=how+to+use+reverse+psychology+to+get+a+man+back PDF link annotation
    • http://keepxufi.space/bulova_precisionist_98b229_review47a4g.pdfIn PDF document text
    • https://pevotugimu.weebly.com/uploads/1/3/4/7/134742342/2176a9.pdfIn PDF document text
    • http://blancop.xyz/the_merchant_of_venice_conflict_between_shylock_and_antonios2u96.pdfIn PDF document text
    • http://burrrhey.tech/antichrist_full_movie_free6syxn.pdfIn PDF document text
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/e7f77531.pdfIn PDF document text
    • http://noluwokufemifoz.22web.org/soal_barisan_dan_deret_kelas_11.pdfIn PDF document text
    • http://mastera-saydinga.ru/luganutolukaznjhy2.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/bdaa077a3.pdfIn PDF document text
    • https://zipezeroluxufa.weebly.com/uploads/1/3/4/9/134904793/zasoli.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/fekuse_fegexokisuba.pdfIn PDF document text
    • https://lemusudavigi.weebly.com/uploads/1/3/5/3/135395292/8c006.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/77a975afe.pdfIn PDF document text
    • http://tabikola.online/43521858094x0v4v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_a31682a0884843acb85c6ea0bf5f1941.pdf?index=trueIn PDF document text
    • http://xetitonaj.rf.gd/webumi.pdfIn PDF document text
    • http://xijukogejutaril.epizy.com/video_capture_http_is_not_supported.pdfIn PDF document text
    • http://miwerigijeki.rf.gd/sales_assistant_job_description.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_9085051592a84398aef8e1910ad1b46f.pdf?index=trueIn PDF document text
    • https://dd67658a-cc17-4e1c-bca5-42bf299a485b.filesusr.com/ugd/07a440_eb73b4b69728499aba1115163a2cb3e9.pdf?index=trueIn PDF document text
    • http://witesibezixu.epizy.com/wastewater_treatment_plant_design_report.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_off0001010b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010B 5768 bytes
SHA-256: ce3cb9022ef5e541049004de65bd0c9467cfff419d839664f9930fa5e0a09aa8
font_01_sfnt_off0001149f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149F 10524 bytes
SHA-256: 8390d0fb7c965c25fa399a685483f72070d9cc7d6f9b096a26d3ae0564473264

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