Malicious PDF — malware analysis report

Static analysis result for SHA-256 667ec7175b402bb3…

MALICIOUS

PDF

91.5 KB Created: 2021-05-31 03:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 67ab409b7f0a46dc3ea4cd199bb684c1 SHA-1: 489fd2a9536d2463175b5f4f2cfb4a8813b77cf5 SHA-256: 667ec7175b402bb3a51c3d8b0a16bf5df3cc2c5dbe13de9a5e628595f0fa407b
186 Risk Score

Malware Insights

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

This PDF document functions as a lure, presenting itself as a movie download link to entice users. The primary link redirects to a link farm containing numerous other PDFs, suggesting a campaign to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent, with the PDF_SEO_LINK_FARM heuristic confirming the presence of a large number of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/strik?utm_term=percy+jackson+and+the+lightning+thief+full+movie+download+in+tamil+dubbed+isaimini PDF link annotation
    • https://kogemujifogez.weebly.com/uploads/1/3/4/3/134344524/baronuxufudukoso.pdfIn PDF document text
    • https://gixejeti.weebly.com/uploads/1/3/4/3/134326891/guxurozopuwok-lumevobumamojep-rujunumed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_60654894d430e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464710/normal_6002f183634cd.pdfIn PDF document text
    • https://genopajixon.weebly.com/uploads/1/3/1/4/131452954/foluwe.pdfIn PDF document text
    • https://dizorewumuzesab.weebly.com/uploads/1/3/4/0/134012942/3956120.pdfIn PDF document text
    • https://buneresax.weebly.com/uploads/1/3/4/4/134478328/gokososar.pdfIn PDF document text
    • https://nevozijefase.weebly.com/uploads/1/3/4/7/134748823/2c249a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415740/normal_5fee2c5aa0fff.pdfIn PDF document text
    • https://lefeputabewaro.weebly.com/uploads/1/3/2/6/132695219/guzawiguwinoge.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/2f434c50-27da-431d-8bd9-0e192fae2699/what_is_an_example_of_a_computer_system_resource.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8890931-7b52-4708-83a9-eb6cb7eb311a/how_to_learn_f2l.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88db98e6-06cf-44ca-ad33-33b2f650d220/how_much_weight_do_u_lose_after_gastric_sleeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c81eebb-7b72-4045-a4ef-6d4423603a6e/vovijuvovixobiverodeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7123b1c8-dabf-439f-9999-4fb9567f08fe/4812113646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3fbaa1-9eaf-4587-b9e3-912cd622119e/hp_ultraslim_docking_station_d9y32aa_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429b9480-df26-45b6-87c6-73a3642e60ac/vuwimev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6eaf7d9-ec52-400f-a415-b730481392e7/88668215622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751f54fd-4e39-4eac-8bbb-9a1f03b85a43/49792725212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5741e7-36db-484f-a8d8-a65f83d367f4/what_is_composite_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b31265-a93f-4f5d-91f6-e7229558382e/61321107953.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001173d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1173D 12108 bytes
SHA-256: 8b050ffe07db0b2f7a88c3f307f4dcd53d4a0f12f940207ecef9c56a3a7dafd4
font_00_sfnt_off0000f20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 6744 bytes
SHA-256: 8187145963fbf8e0b7977f93bb9cbfc296fb812f6e2b6f40a3c8d31ca5a797a4
font_01_sfnt_off000102f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 5972 bytes
SHA-256: 9b2f03b3a67cdefb32fee6a626974f37de1c1b734766c760b99f29b4922da052
font_03_sfnt_off00013665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13665 11712 bytes
SHA-256: 51d18e817677b74961824383e2fbf33d104c76ca99fdf80bb157d14eea0fa44a

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