Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd118bd312b030e…

MALICIOUS

PDF

86.6 KB Created: 2021-05-26 05:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e1c7b86ce928a5224ddb4a47f2644b08 SHA-1: 90b202757e6e270ba44031d82bba3397ed736479 SHA-256: ddd118bd312b030e0563e6529b290fd0cea8e1bf9b0fc876934a0502a431e10a
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to contain metadata related to 'Bergey's manual of determinative bacteriology' and 'wkhtmltopdf', possibly as a lure. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=bergey%2527s+manual+of+determinative+bacteriology+vs+systematic PDF link annotation
    • https://monotolifevi.weebly.com/uploads/1/3/4/6/134683372/losuguxixebudo.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/fokezevuxeruxi.pdfIn PDF document text
    • https://wiwupaluw.weebly.com/uploads/1/3/1/6/131606778/zejogotefi-xijen.pdfIn PDF document text
    • https://nolugebufumo.weebly.com/uploads/1/3/4/5/134597996/zidilasuxiwitegito.pdfIn PDF document text
    • https://jufigewadekuxo.weebly.com/uploads/1/3/1/4/131406441/853b178f4911.pdfIn PDF document text
    • https://janewabogub.weebly.com/uploads/1/3/4/4/134483822/2845441.pdfIn PDF document text
    • https://tuxupurevulivi.weebly.com/uploads/1/3/0/8/130813143/6468698.pdfIn PDF document text
    • https://wokukowuvewa.weebly.com/uploads/1/3/4/3/134316041/sodidefuxojugap-juzufelanape-taforo.pdfIn PDF document text
    • https://lodoxaravejow.weebly.com/uploads/1/3/4/7/134719504/3575678.pdfIn PDF document text
    • https://patipuvilinuw.weebly.com/uploads/1/3/4/4/134487218/vinibaje_xonotolitanofu.pdfIn PDF document text
    • https://kisagisetiduke.weebly.com/uploads/1/3/4/7/134762251/josifose.pdfIn PDF document text
    • https://nefarixutasirov.weebly.com/uploads/1/3/1/6/131606035/8648730.pdfIn PDF document text
    • https://gosibipidumoduj.weebly.com/uploads/1/3/4/3/134318513/6128329.pdfIn PDF document text
    • https://punopofogow.weebly.com/uploads/1/3/1/4/131437229/4221047.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/d5add034-5f14-45cf-b5e0-b900c5b23936/miller_xmt_304_cc_cv_welder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f76676-037f-4738-912d-200777b94793/redhead_gun_safe_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a5bbf6a-f7bb-4f60-bce1-c414d4c3a714/pujureken.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/xexixasotaxedirafaregixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08ee7da-74bd-41e5-81c9-c0d12ab973d5/how_to_pair_plantronics_bluetooth_headset_with_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/moginakuzojanizisilox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3593f83d-0a74-414f-9422-da8d2a659e59/61321292267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef51e0e7-3bfa-477d-9093-b022c071c81c/hitron_e31n2v1_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dbbfd7e-4f2d-4301-abfa-9c4b35061867/how_to_connect_cp_plus_dvr_to_wifi_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a84f32-a68c-414b-bd72-76942a64386a/zavinurojivuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b5e9ac-4ab7-42f0-bca2-4e6379cf5992/how_to_book_an_appointment_for_driving_test.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_off000106d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D1 1812 bytes
SHA-256: 419683f0e211b7bf7d7c9897cbf738e44c5d25dede3a2d6bd53bc2ebece3a3c1
font_01_sfnt_off00010fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA4 5724 bytes
SHA-256: 67073bdc2ecc7d9e264b40c6ef95d733791a359e7c2e6f1d8e95129c5d104474
font_02_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 11200 bytes
SHA-256: 171882cd714abd57ed4f7ddb9f5b60dc29ee83b91c35e1b26fdf9303411ff7b1

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