Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2952329a7b897d1…

MALICIOUS

PDF

87.9 KB Created: 2021-05-15 06:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 87d0f38580c893f2bae04799ecac1441 SHA-1: 9e3e1498b52c30260f99a835730f9ebe16250e0c SHA-256: f2952329a7b897d178de8baf134479a14d65cc80151441213ee0353090b21dfb
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://seumenha.ru/strik?utm_term=hp+stream+11.6+laptop+celeron+ak0004tu+specs PDF link annotation
    • http://beririka.scienceontheweb.net/tapofabenawavetinepaxo.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/jizizudurimuwove.pdfIn PDF document text
    • http://gefupokilive.iblogger.org/jewavipotimuji.pdfIn PDF document text
    • http://pupunorip.getenjoyment.net/texte_apocryphe.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/9566869.pdfIn PDF document text
    • https://nedebubet.weebly.com/uploads/1/3/4/8/134854500/wuwifi_wavut_nikexadajudow.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/political_map_of_asia_with_capitals.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/e4fb83e74.pdfIn PDF document text
    • https://xumefuzodagugud.weebly.com/uploads/1/3/1/3/131384373/1937339.pdfIn PDF document text
    • http://palawawez.mypressonline.com/natabewi.pdfIn PDF document text
    • http://bigezidara.mypressonline.com/37092349047.pdfIn PDF document text
    • http://betomererag.iblogger.org/is_there_a_lifetime_warranty_on_stanley_tape_measures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://zanavaf.epizy.com/zamokopudopebagivojirepa.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_cb9ccbc1d21b40d9b3aec6bc828f0490.pdf?index=trueIn PDF document text
    • http://sefowolo.atwebpages.com/coliformes_fcaux_dfinition.pdfIn PDF document text
    • http://gisujibegu.epizy.com/cancer_cells_properties.pdfIn PDF document text
    • http://kisolapuri.rf.gd/76461281570.pdfIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_a9182300f79c48f79ff8b2fc6d5e823c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/137c2ac0-75b0-477d-b34e-48bbe022cbcb/buxiwexovom.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_5d7f7532ed694d839ad94bae370f71d6.pdf?index=trueIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_7d8dae61d5384696a723a2421345d990.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a351f5-82f4-4942-ae5e-3b0b1ebc2799/sherlock_holmes_full_book_series.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 5572 bytes
SHA-256: 0a43896c69fc6fad19759563516dc805010422ec0fe35ab2e30b0b308f7de0d5
font_01_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 11104 bytes
SHA-256: 0403f4e23a40e19a55c1676e0dc27d08822ebd0558af261354f1adec8ffbcce2
font_02_sfnt_off000134c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C2 8692 bytes
SHA-256: ef1678d431b364f3179d2f51ab4e224486f877fa4f87adcbf6e506184e10b575