Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fafea04d83faa5c…

MALICIOUS

PDF

88.3 KB Created: 2021-04-07 18:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5c0332aba58ddc893940bae2fd1e89df SHA-1: 2a2bf8c9927578b8395897aee273ccdb0d8cd334 SHA-256: 4fafea04d83faa5c12ea5f4f553f9acafe1a1259f0e4e7b0d9919033debc565d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the link farm suggest an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=cultivo+de+pi%25C3%25B1a+en+ecuador+pdf In PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/kasazej.pdfIn PDF document text
    • https://newowuwaw.weebly.com/uploads/1/3/4/6/134634034/6280f31cc8.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/brche_addieren_und_subtrahieren_klasse_6.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/xaxodedujuti.pdfIn PDF document text
    • https://vokidasurodetax.weebly.com/uploads/1/3/6/0/136089353/ad4f2.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/que_es_una_propuesta_de_proyecto_de_investigacion.pdfIn PDF document text
    • https://raminatu.weebly.com/uploads/1/3/4/5/134579417/a0a27ff822c3.pdfIn PDF document text
    • https://dizilezojo.weebly.com/uploads/1/3/4/2/134234798/farelawiri-vituwaba-rokasuwajokopex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitubak.atwebpages.com/iit_indore_non_teaching_recruitment_2020.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_d5e3a8d754634fe488ff182b2c5cb66d.pdf?index=trueIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_11c154356ebd497d8410fe54ddaa1c13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/sanapokomonuge.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/kupupaxegelum.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/annex_14_icao_free.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_11baee7bff4d4705ab6302015d71d9d4.pdf?index=trueIn PDF document text
    • https://a529afa0-707c-494d-9cee-e9df2360aa12.filesusr.com/ugd/a6e48a_ef870a6d53d34464b00430e02de94aee.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_4becff386b294950963976cc8f036cff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/danielle_steel_all_that_glitters_asda.pdfIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_04c1939fe5f042c588d85b8326d07433.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/96926608377.pdfIn PDF document text
    • https://acda325f-ee3b-40e4-882f-fabc489a6840.filesusr.com/ugd/23b3d3_95aae845da23415f8d0f1e41fcedf250.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/58655769873.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/fedigoremutivine.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/sapogenezar.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_off00011549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11549 5148 bytes
SHA-256: 5600f698f3c56775031612d7d7fa2adf5d2274a24b2cb840380f64547aa2e15c
font_01_sfnt_off0001269c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269C 13328 bytes
SHA-256: 388aab14c439b2eba0f1ab8e3ebcb521d2e26c01bea7df5d7db8a58f3fc559e3