Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1387eb728493174…

MALICIOUS

PDF

76.4 KB Created: 2021-03-06 08:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 61f456beacc9b785dd5bb0e2c39c88dd SHA-1: a87c4f90661538cb722438bd8319a284f147ebab SHA-256: e1387eb728493174efd64e34415dbcb28fa22dfd5642fd14bb35d4c3138689f7
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 0.9993

Heuristics 5

  • 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 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://jottigo.ru/wix?keyword=blank+color+wheel+template+printable PDF link annotation
    • https://cdn.sqhk.co/tevimuwijile/dSieijU/63880495581.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/bEpogeu/amazing_breaker_level_64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_601c88bf6a48f.pdfIn PDF document text
    • https://legorigerelok.weebly.com/uploads/1/3/6/0/136056749/memuninosi.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/asus_rt-ac87u_firmware_tomato.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/xuwiteluzopu_tenuwekoxez_romalajigorij_rifuwapinezilad.pdfIn PDF document text
    • https://xipasole.weebly.com/uploads/1/3/4/8/134853136/mujezam_bukovinimigeve.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/argument_from_reason.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/0ia8Njf/satuvapupajepuzarunuk.pdfIn PDF document text
    • https://xoxoxiwozolem.weebly.com/uploads/1/3/0/7/130739626/nonukusudevuz-wemodoxitidaz-vurug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426699/normal_5fe4a8d44e9cc.pdfIn PDF document text
    • https://viledilexemapol.weebly.com/uploads/1/3/4/6/134698440/kajirudufozowak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417327/normal_5fc9fbf62e4dc.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/58820867929.pdfIn 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/1908b6cd-917f-4c76-a6bb-9f8d1cb78a58/sejufog.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/whats_the_ugliest_dog_breed_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78cdf995-12fd-460d-ac4f-de0207dca7f7/rv_fridge_not_cooling_on_gas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2cde5b2-cd10-45a9-9c43-e01055a25cc7/what_percent_of_boy_scouts_get_eagle.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_95707805f46b428c89da16f622e61ae0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69be7841-ddb0-4b49-8025-ada8a5dab9bf/the_rockpile_by_james_baldwin.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_787ece7e0e644410b27f8f07187ab041.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/755e1238-4a45-4f3d-9176-331bfe087082/you_park_downhill_in_a_vehicle_with_a_manual_transmission.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_c8c4ee3393234341a436743195645dd3.pdf?index=trueIn 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_off0000ee1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1C 5340 bytes
SHA-256: ea1d4577f4ee83d0e5d43f669adec264a03f487a6514d98dd0e74982865097bf
font_01_sfnt_off0001002a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002A 10520 bytes
SHA-256: 287f97ff0eb90219fc07c0d0110d85865240a0661d2276efa86f67c0d3832a0a