Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2c72a407f3f22b…

MALICIOUS

PDF

82.7 KB Created: 2021-05-23 22:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6f128dbbb847a23b71247325ffb1eb24 SHA-1: 2343184d840d23e2a43f71933ab438ace70a6b64 SHA-256: ac2c72a407f3f22b6ecedbdb4e4774b49cda62a53a3c948d728c335afba4ff68
164 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings. One prominent URL, https://vilenefex.ru/strik?utm_term=rise+of+the+planet+of+the+apes+movie+download+in+hindi+480p+filmyzilla, appears to be a lure for movie downloads, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/strik?utm_term=rise+of+the+planet+of+the+apes+movie+download+in+hindi+480p+filmyzilla PDF link annotation
    • https://wexikapej.weebly.com/uploads/1/3/0/8/130874413/pelulifoxupefepim.pdfIn PDF document text
    • https://mitixomog.weebly.com/uploads/1/3/4/8/134859124/wapono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_6009f86cec2d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494669/normal_5fdcfb2680451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fee94635e7b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/78908148212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b924b1-fc72-4075-b392-c7241a1884f7/nexisapidakenut.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/spreadsheet_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938d6a8e-efb8-41d6-940a-0c688bde2e3b/what_is_json_processing_exception.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c478c07-0515-4e05-a8ab-144065f0b983/47588068307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04bf619a-b3c6-4403-91ff-cbaec03567b9/vapexalifuserojefeteso.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/17852895979.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/biohazard_sign_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a46ac03-b121-4269-8088-93ada0fb5726/49428007987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deea937b-7c90-4159-9006-2ab5300af906/sims_3_pets_cheats_ps3.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/mewuxawefobav.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/21809080251.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/68357191220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ca87fa-4387-4f58-8bf2-422fd23f90e2/how_to_reset_haier_fridge_freezer.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/wibojesulomuloxovoxijogut.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/25013568181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c28cb6d-3049-4673-8962-434425213483/dizuzazupusi.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A1 5920 bytes
SHA-256: 9a7889237d233fd700914049995da1e281a9c9940697bf3d3325919246e7396c
font_01_sfnt_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00010135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10135 10980 bytes
SHA-256: f8921a12b598bf16a3a65de37191f6d6765f6d67025a70696340d5011d0f2b2a
font_03_sfnt_off000126bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BB 5824 bytes
SHA-256: efe12fa5f5c26963b848d55d27f27525b57c8184232bfa853a30daf90ed7cf20