Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d6e945fe23d499…

MALICIOUS

PDF

81.2 KB Created: 2021-03-15 05:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1a6bd80fab05aa77974a132ef6398d5c SHA-1: 6b7ad34600c4129edc43c4e95fd41df4feb5f549 SHA-256: 49d6e945fe23d49903ee5991bbe47082dd46d082080dacb70742fde7a999a712
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous external links, including one to 'soxebez.ru', suggesting an attempt to drive traffic to potentially malicious or SEO-manipulated content. The document body, though heavily obfuscated, appears to contain metadata related to its creation and the deceptive topic of aircraft registration prefixes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • 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://soxebez.ru/award?keyword=aircraft+registration+prefixes+pdf PDF link annotation
    • https://cdn.sqhk.co/kemomonil/5geb2hc/riroluwizukedivozinev.pdfIn PDF document text
    • https://cdn.sqhk.co/konosoka/sjdhjih/power_rangers_super_jungle_fury_episode_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_60084ed98e1e2.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/vitujudasolud_gugawo_gidegiza_ninem.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/pathophysiology_of_bowel_obstruction.pdfIn PDF document text
    • http://penageli.getenjoyment.net/gefatukasojopomog.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/kenmore_microwave_790.803_fuse_location.pdfIn PDF document text
    • https://vopilexazum.weebly.com/uploads/1/3/2/7/132740267/2124084.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/djdhhUN/off_road_trials_simulator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426960/normal_5fe07d04c8d57.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/charles_dickens_a_christmas_carol_first_edition_value.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476757/normal_5ff1cb1109f92.pdfIn PDF document text
    • https://wemogejivaje.weebly.com/uploads/1/3/1/0/131070934/jepodibusezefuz.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/gEhdWE2/selijituposo.pdfIn PDF document text
    • https://bexenexitefixu.weebly.com/uploads/1/3/4/7/134725849/2974706.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/ciexghH/geoffrey_moore_crossing_the_chasm_chart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491437/normal_5fcb09376a240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408703/normal_600654898678e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_e445066ed22b4888bd6a5320cffa1c4f.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_c0e993d8f1ee4cc792405dbd6b507424.pdf?index=trueIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_c397e4d0993e4401b930c1c8f4ea3f5b.pdf?index=trueIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_bf3505e65a4943f28cae7c0371535230.pdf?index=trueIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_c8731b801d0845569d8a5a374739813e.pdf?index=trueIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/animal_and_plant_cell_structure.pdfIn PDF document text
    • https://ad177677-9664-42cd-9bf2-17a10eef6e1d.filesusr.com/ugd/f8915e_31f22c09de514b989b93805aebe3607a.pdf?index=trueIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_3b81ff2fa159442f9cc09f3a0978a1a4.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_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 5348 bytes
SHA-256: cb0768fd860b78a3495b0ca7fab4b2efeb6ecd193de36ba4834b1578f6801c1d
font_01_sfnt_off000111b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B5 10832 bytes
SHA-256: a80a6dbbaed0830fb587897a68951f3223e59f6c2fa04801f18a4aaf6b722ba6

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