Malicious PDF — malware analysis report

Static analysis result for SHA-256 215282bc5db47543…

MALICIOUS

PDF

83.2 KB Created: 2021-03-29 01:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5b7cf962f6440a17193c9448d3084b6e SHA-1: d96d8ef7614701b05d17902f563a12b74e28e51a SHA-256: 215282bc5db475436c390c4a3250110841abfe7be933f5d055de3d31d8fceae8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially malicious content.

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 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.
  • 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://jumiwimov.ru/strik?utm_term=how+much+does+spay+or+neuter+cost+dog PDF link annotation
    • http://douchehq.xyz/what_is_enlightenment_kant_summary_sparknotes7zetp.pdfIn PDF document text
    • http://zyzycheat8.xyz/689281785919m8if.pdfIn PDF document text
    • https://riragipus.weebly.com/uploads/1/3/4/3/134358734/kanaderob_kituvitofavof_rofifivusadez.pdfIn PDF document text
    • http://waxopuvuru.22web.org/56957282704.pdfIn PDF document text
    • https://gedimonisesejed.weebly.com/uploads/1/3/1/1/131163996/3040522.pdfIn PDF document text
    • http://ijmalan.xyz/99117683672jwsuj.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/1238839.pdfIn PDF document text
    • http://ritual-venki.online/is_there_an_app_for_transcendental_meditation29okv.pdfIn PDF document text
    • https://rezepurobej.weebly.com/uploads/1/3/5/3/135327696/6509138.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/whats_a_blind_nil_in_spades.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/87063228577.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/48525060965.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/how_to_reset_unifi_to_factory_default.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/kilomosuzanivono.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/waluxodarilopufepik.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/66454654318.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/administrator_command_prompt_apk.pdfIn PDF document text
    • http://revifobatuge.rf.gd/45981391478.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/83654523254.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 5608 bytes
SHA-256: d0ed17a88cf65531fd02129d4d0a59964ed32e2e547fbd2b9fb4efae655c7f26
font_01_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 10640 bytes
SHA-256: 71a0fc393c534d484ed07f3bf7208b0f24f975f4a38235458d743a83d33639aa
font_02_sfnt_off00012566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12566 17004 bytes
SHA-256: 134be0e2b8f5ab8f11a44b11bad936ab9c02f3383432b0078b85882762083dd1

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