Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d06698c9d0b41b…

MALICIOUS

PDF

75.8 KB Created: 2021-03-23 18:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8529056468693e58ac8f4b41337e82fa SHA-1: 9dc074b48617876a061d770f269059dd14dc3ed7 SHA-256: 95d06698c9d0b41bc94d565eac686b47eca649f1fe4500c6f3e6d33b3eacfceb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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 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://gimoguvi.ru/award?keyword=cea+regulations+2020+pdf PDF link annotation
    • http://iwhite.space/wordpress_social_login_shortcodecakyk.pdfIn PDF document text
    • http://xulagivinap.22web.org/educated_tara_westover_book.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/maytag_neptune_dryer_heating_element_replacement.pdfIn PDF document text
    • http://zejegilige.iblogger.org/jixazutuxuzuripom.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/39341912559.pdfIn PDF document text
    • http://cucoupon.info/38094601984um6ws.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/90916492872.pdfIn PDF document text
    • http://metryck.info/devuzebidezukinowow5wids.pdfIn PDF document text
    • http://bigowet.xyz/6236819154tvt9w.pdfIn PDF document text
    • http://swast-group.website/24477518892daari.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/34625102592.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/accpac_payroll_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5abffae-df09-4846-9058-34d95bd4fe93/farewell_to_manzanar_audiobook_chapter_6.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/templates_for_baby_shower_invitations_word.pdfIn PDF document text
    • http://xerivigop.rf.gd/62462024786.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/niacac2_is_paramagnetic_but_not_tetrahedral.pdfIn PDF document text
    • http://zitejilid.epizy.com/arrange_decimals_from_least_to_greatest_worksheet.pdfIn PDF document text
    • http://mokineso.epizy.com/maluganapogegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a6a775-2f9a-4638-adb9-ef384619b5cb/jogepefitozufogipurek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5226631-4384-48a7-bd67-9f5de28177ce/how_does_transgender_surgery_work.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_2a9045b7fcae4c02a9e4e76e7abfac48.pdf?index=trueIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_0199ac2a14e444c9beca086dd8ad602c.pdf?index=trueIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_21f37cf7997643e1adfdb41850b876a6.pdf?index=trueIn PDF document text
    • http://tafiwepamubov.atwebpages.com/resin_hedgehog_bookends.pdfIn PDF document text
    • http://womawujun.atwebpages.com/relion_blood_pressure_monitor_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c02071c-fae8-412f-96a3-88b546d19fd4/59552994801.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/best_rated_convection_toaster_oven_2020.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_off0000eb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 5388 bytes
SHA-256: d76945205d7d8814f5297293d34344d95387a45da1808bca6fdc3265044a91cb
font_01_sfnt_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 10484 bytes
SHA-256: b48b1b26e3fc89469f71bce2b39ee55336bb72dd12e22ffbbb00769311f5f2de