Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a0613cc4c24d00…

MALICIOUS

PDF

78.9 KB Created: 2021-03-11 05:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 510a8b325ce2ac1dc06e579f2926a188 SHA-1: 5b018c6dfdaa56129830717372cdb812b68143bf SHA-256: 88a0613cc4c24d0061c8711468f2e451cfcffcbfe853b313b0a619d996d48cff
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains numerous external links, with a primary focus on SEO spam and potentially phishing. The ClamAV detection further supports its malicious classification. The document body, though heavily obfuscated, suggests a lure related to 'Buffalo wild wings menu pdf 2020'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=buffalo+wild+wings+menu+pdf+2020 PDF link annotation
    • http://pubgmobiie.com/norcold_n611_door_panelshmk70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fed1fdb66083.pdfIn PDF document text
    • http://nyvelsets.online/new_journey_with_life_partner_quotes4d85z.pdfIn PDF document text
    • http://wonnaturila.space/228673757f7m06.pdfIn PDF document text
    • http://shopbest.online/91205282432pf4oz.pdfIn PDF document text
    • http://pubedetavilew.22web.org/third_person_singular_form.pdfIn PDF document text
    • http://malalij.iblogger.org/how_to_make_easy_wood_projects.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5fcf2daf1056e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5ffbbc781ebda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_1e9ac376604540bca2357dd7aadceac7.pdf?index=trueIn PDF document text
    • http://jokipuzovorije.epizy.com/snow_white_princess_in_spanish.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_0add771adcfe4de1b23e2e24bccedefd.pdf?index=trueIn PDF document text
    • http://jujabezemaluwe.rf.gd/alone_together_lyrics_the_strokes_meaning.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_78ed63e2e5ec49efada056dbda2e22ce.pdf?index=trueIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_42c157ac203941c3827fc21572165bf2.pdf?index=trueIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_ecd52921b66a48ef93232a247c141118.pdf?index=trueIn PDF document text
    • http://lovofazojoj.rf.gd/70198000918.pdfIn PDF document text
    • http://lizolubemerawi.epizy.com/rumuj.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_80b2396350354ed58416cab6d5a22b46.pdf?index=trueIn PDF document text
    • http://pasazaxara.rf.gd/34581050211.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_c4ac53e843a74319a8de6c9fcb991288.pdf?index=trueIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_671ef604d3c84dcaa18f3ac207cefbb5.pdf?index=trueIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_65123bad543d4445a26836bef5ea48bb.pdf?index=trueIn PDF document text
    • http://dowenoji.rf.gd/constructive_dismissal_template.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_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 5680 bytes
SHA-256: d8b974796f849a910abc879401b63534c4235463849ae64354b5236ce1ad1373
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 10380 bytes
SHA-256: 1e72426be19d30a56fc0c6b934ff1eb0c504567fca5f8406a9ef7cf6e7ff0e38