Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0aaafdaf65d7b01…

MALICIOUS

PDF

83.4 KB Created: 2021-03-24 17:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6b97aa6bedd18f019b5ed9f0b29fe6b5 SHA-1: 59c8091a217f1d039952914e6f801a3c5dee7dbf SHA-256: c0aaafdaf65d7b013bad13d7f625996a8f2503869d367956155862e378653526
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://baarspo.ru/wix?keyword=ark+gacha+claus+ragnarok+location', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=ark+gacha+claus+ragnarok+location PDF link annotation
    • https://cdn.sqhk.co/pewowutefiw/vnjcgik/acids_and_alkalis_crossword_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/hdjaiji/how_to_get_hachiman_persona_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5fcb72163c4c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5fcbe5c510ec5.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/WiifBib/cannice_bluetooth_headset_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/08hahaz/pivevomatadotetinaxof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4926574-67e3-4761-ada0-31a28ed5e770/4175264036.pdfIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_0338bc9af74540d7aee3250145caf3be.pdf?index=trueIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_ead8e273c79c4686aa50fa56bbccb2d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6b4f9a-9879-4322-9a2d-8320017f0685/95213501457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96ee290-d6c0-4a2f-856e-667e643a5998/colombians_living_united_states.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/189f3542-b603-4eed-993b-ea51cc3d823d/dajatewonogasez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ed9e58-499d-4945-b4c0-26cc9ade2c28/how_many_calories_do_p90_workouts_burn.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/63829006316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e435943b-8750-4910-a3c6-199a66f5d74c/system_verilog_case_inside_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/dujokajuzetusirodufez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236a7181-e6ef-41db-ba73-d84d4eee5b9f/what_are_the_current_comcast_packages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c996ae-c54e-42dd-99b7-619d80df277d/perceived_wellness_survey_questionnaire.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/miwurigubozejusowusojolus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef4f71f-94d1-4b9a-9b93-71ced4b46449/how_to_fix_a_dishwasher_that_is_not_draining.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_c51f8e5d7ef2479886d2cd3ea2dcab58.pdf?index=trueIn 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_off00010949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10949 5116 bytes
SHA-256: d09474464d8275bc4d860db1ae6949cc3213142fb1598965c59969eecc0b5815
font_01_sfnt_off00011ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB0 11064 bytes
SHA-256: d0873e7c63199c85c9778e2448b3581871a9ce165c875ad56121b91b6ea643bb