Malicious PDF — malware analysis report

Static analysis result for SHA-256 66749086343514e0…

MALICIOUS

PDF

78.5 KB Created: 2021-03-14 23:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 781bb6ade8753e8004fbcd2a3a5c9c6b SHA-1: 3635ade0983bcbf4f32b81ea2d0c9ce66985525d SHA-256: 66749086343514e01903c87c4a8797ba4bfdc77b78657c205b4d608c4da67cd4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, indicating a link farm or redirection strategy. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body, though heavily obfuscated, contains text related to 'Bosch dishwasher service engineer', suggesting a lure to direct users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=bosch+dishwasher+service+engineer+near+me
    • http://pinezotamex.getenjoyment.net/peter_pan_and_wendy_jm_barrie.pdf
    • https://sudazevoj.weebly.com/uploads/1/3/1/4/131406082/mewomi_zodiwuxonovalo_sunegodo.pdf
    • https://cdn.sqhk.co/ninuxoti/ahjjggc/hot_toys_tron_light_cycle_review.pdf
    • https://fejixugemab.weebly.com/uploads/1/3/4/6/134681032/sopaketidutudiziwi.pdf
    • https://cdn.sqhk.co/wadelovelo/xV4gjhj/20695077532.pdf
    • https://cdn.sqhk.co/mibemofega/jbgZRjg/5362643477.pdf
    • https://simokodopegaliw.weebly.com/uploads/1/3/0/7/130776428/manibexuwuramanori.pdf
    • http://suwetobolubujub.getenjoyment.net/6395815460.pdf
    • https://cdn.sqhk.co/sukurorezib/4ifhei4/38656953277.pdf
    • https://cdn.sqhk.co/navotezive/EQidhhU/61471643504.pdf
    • http://gakagebir.mypressonline.com/liwagawakebigujuxir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_931edb01afea493d8ae368ca66d61000.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9ed78571-9d19-49bc-8593-78ed399494fe/gepuzi.pdf
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_2c92eac234454843a0b26939f5fb2c68.pdf?index=true
    • https://uploads.strikinglycdn.com/files/44d11386-d1b3-49d7-bc30-c916c8b54d0d/ukulele_for_dummies_reviews.pdf
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_35a688c637674b348bacf5bbde144c30.pdf?index=true
    • http://tavamikilav.myartsonline.com/muxojemawawabuduralebuz.pdf
    • https://s3.amazonaws.com/xijilesuzuxo/92665339227.pdf
    • https://uploads.strikinglycdn.com/files/4afef7af-e5b7-4534-a778-be9912ee022b/what_organisational_structure.pdf
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_c1ee6fb36492468b92906f30999129ef.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a5291e0a-a4bd-41cd-a203-a54f251299c7/sas_ods_excel_file_options.pdf
    • https://uploads.strikinglycdn.com/files/8fd76961-3d7a-4da8-a657-a81c7f45522d/bexapeximebebajidiwimuz.pdf
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_5272f9b3c01a42ffbee116d91d4a0f20.pdf?index=true
    • https://s3.amazonaws.com/mikibetiv/zeloki.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f314.bin
95e124391eb66d09d69497d81442f9597b64567eec914af85855b6ff57d378b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 5524 bytes
font_01_sfnt_off000105d0.bin
49cbbafb9212d5e3fb4d9736cb10f50f59177f6b84a272957757c7e8d3dbfb2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D0 10804 bytes

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