Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54b09a62ff21f90…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 21:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5cb00c1d2427d7e3c68ce79341710d13 SHA-1: ff6d49708be0d2c1b410e4bf8a685166ab3b76d6 SHA-256: e54b09a62ff21f90bbff74844977610f3f606db4b459e4b772f67eb6a999785a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm designed to direct users to potentially harmful websites. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://seumenha.ru/award?keyword=definicion+alcoholismo+segun+oms+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449627/normal_5ff75d7216826.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/70361610785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384320/normal_6005167aa3638.pdfIn PDF document text
    • http://dapovevi.mywebcommunity.org/37403855057.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5ff3250cf41dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482645/normal_5ff78179d9526.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/19354186517.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/76844432307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_6029d6ee29f10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f3e0ee59-b309-4736-aefa-1db4f942b0be.filesusr.com/ugd/e87662_ff150eb6963f4354b8582728730dbe73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83932576-7266-43bc-b479-736ec93fe12c/law_of_property_and_easement_bare_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fb5b11-4c69-42b0-9539-ca7c7d230ef5/gomugadaxilax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0366e6-8c76-4033-9795-d824dbcfbf3f/nevufifelekabewedipasezof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f08b17-e67b-4013-96c1-f2b62bb33af4/8095945588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054bf68f-5a66-4749-bb08-39d7e48cc49d/fizavesodolimubipise.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_3013bb2355814bd4a9888a03e5351315.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/580ac768-b91f-4f7a-9554-f86f808a9975/welolasewawarawaxejado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68343eb5-2905-4ed8-a5f2-bdb2d78bf22e/how_to_reset_bluetooth_pin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23e4090-5d9a-46be-bb2f-63e97aa46b61/club_car_precedent_parts_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d72545c-32c4-405a-aa20-8f6dc16b37eb/what_rank_do_you_have_to_be_to_be_a_pilot_in_the_air_force.pdfIn PDF document text
    • https://37459de8-d961-4a2a-897a-801dad55dcfc.filesusr.com/ugd/1395e2_f189e14f8d764502806bf0256a2b65b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33701b89-e911-4720-86fc-eb9c9d2bd89d/55356515806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab253ee7-d999-451b-81d3-4ea9e2cc1a52/gelurigitogikojomikegofu.pdfIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_2d7e20984c504a3c9380c314295659fc.pdf?index=trueIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/story_of_my_life_book_download.pdfIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_402d7960e22a47d9ab8053b8626e56a0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a740ae-0bb4-4654-96bb-fc57e6751919/xoteporiwodovomebe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52D 5472 bytes
SHA-256: 371ce7dff9b76bcc14af28003f0947ca52351b6b0cccbf159e12ec3b836bb22e
font_01_sfnt_off000107ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 11892 bytes
SHA-256: b3d778f7998ae285d83dd10136eff45edf09bfe7bb5763e2e342260893bd7572

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