Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6ce4433ca49eec…

MALICIOUS

PDF

84.7 KB Created: 2021-03-22 13:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 05c5aa08926522238974780f4785ed2c SHA-1: 1dea5dac4b211aa70feb190cfedcc79c8ff621eb SHA-256: 1f6ce4433ca49eec48ccd57caaf20e3e0ce214b7a2c8da825c22d8d9640a4f16
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • 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://bologen.ru/wix?keyword=glencoe+world+history+chapter+13+assessment+answers PDF link annotation
    • https://vonufire.weebly.com/uploads/1/3/4/5/134596457/8563174.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/difulud.pdfIn PDF document text
    • https://tidixusega.weebly.com/uploads/1/3/1/3/131380021/2242309.pdfIn PDF document text
    • https://solugukaxazazo.weebly.com/uploads/1/3/4/7/134748989/besizu.pdfIn PDF document text
    • https://sulunekuzesafap.weebly.com/uploads/1/3/1/4/131406846/fonebuj.pdfIn PDF document text
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/771c328638b4.pdfIn PDF document text
    • https://dibozuvoba.weebly.com/uploads/1/3/4/6/134692955/3200421.pdfIn PDF document text
    • https://badevejolaf.weebly.com/uploads/1/3/4/8/134867981/df1b0244.pdfIn PDF document text
    • https://migufakugiguxob.weebly.com/uploads/1/3/4/5/134579218/23b9d.pdfIn PDF document text
    • https://guxitodek.weebly.com/uploads/1/3/1/6/131637279/xufiwidivevota_wavozewet_sogidilaneli_mopedatofosazu.pdfIn PDF document text
    • https://negowuvezesat.weebly.com/uploads/1/3/4/8/134859399/kamowu.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/ecf67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c5ca9806-ff7a-40c4-8cf2-45b151449336/how_to_start_a_husqvarna_125b.pdfIn PDF document text
    • http://jerovewoxisabu.epizy.com/ariens_24_inch_snow_blower_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922fd3be-8c1b-4796-b29d-df643313eb34/89298316904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00cbb5eb-61a9-4027-9725-87332ed56baa/gone_with_the_wind_plantation_charleston_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b56b474-3b93-4964-ae78-8e9fa52850cf/trigonometric_formula_for_area_of_a_triangle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b55e95f-1b91-4e9a-8bf4-5e94bc6668bb/55310988874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00773e7-d3d5-4b40-9c8b-76a6db4eed67/39176881268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d8736d-ec66-4bde-ad19-068242208ee2/navoforiwak.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/baixar_volume_booster_goodev_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f880e4f-e995-4741-a75f-8a39e1ce5a2e/lemony_snickets_a_series_of_unfortunate_events_movie_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00493741-cc4e-40c9-a3b0-f078abf906a2/panasonic_dmc-zs40_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d7c6bf-417c-48d8-bea8-6cb92344855d/easy_ukulele_songs_riptide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 5540 bytes
SHA-256: 85c87e1681f861ba21ffafe82e9971be633e8898d7c6b4dca38ab45babe91fdf
font_02_sfnt_off00010ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 11564 bytes
SHA-256: 5cac6654370c5d255edb5b47953e5a546b8faf402c99ead91a79517d09cf6060
font_03_sfnt_off0001345d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378