Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b36f61b804582d…

MALICIOUS

PDF

83.4 KB Created: 2021-03-05 19:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 59ced545abd8a6e0f75f5084e11266e6 SHA-1: 9a3e2cfe48fa4647113019e3540422a0ad7aa114 SHA-256: d9b36f61b804582d116a050e671072e4295e65c7d1e00495c3b6e29799604bb0
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 0.9997

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/wix?keyword=bissell+proheat+2x+revolution+parts+list PDF link annotation
    • http://ryursew.space/511401743913xbjn.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/56374886148.pdfIn PDF document text
    • http://unosital.space/plants_vs_zombies_free_download_full_version_games1nlx5.pdfIn PDF document text
    • http://lg-supportteam.com/87091905198rlaio.pdfIn PDF document text
    • http://gnatural.space/oral_b_pro_1000_rebate_walmart0dg52.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/45702117635.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/57847056322.pdfIn PDF document text
    • http://poradoit1.site/suwamuxuti22xuc.pdfIn PDF document text
    • http://magnitoli-2ekran.site/how_to_program_2_liftmaster_remoteswm6jd.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/rinuraju.pdfIn PDF document text
    • http://dithetsen.xyz/car_dealership_bdc_email_templatesk30xm.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/lesson_plans_for_english_teachers_freemzqcp.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/xogapewiwaparej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexukavibume.myartsonline.com/94279951526.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/centrifugal_pump_calculation.pdfIn PDF document text
    • http://jimarol.myartsonline.com/everstart_jump_starter_750_amp_charge_time.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_1b70209bdf064250a6bdcc0fab3a9744.pdf?index=trueIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_796a37c13b0b4b3baeafac034adf1eb2.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_683bc04798154c5bb74685d1038e69f1.pdf?index=trueIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_aa7750eed82d423b83075d9e73e171ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebomedug/biology_the_study_of_life_answer_key.pdfIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_7edbb89001c74f98a14ef8144f52af53.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_off00010952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 5216 bytes
SHA-256: 27dc84524380240d57fd0309e2caae1618fff4ad67c5cab08e725d458f587b64
font_01_sfnt_off00011b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0F 10840 bytes
SHA-256: 19e803f31e5d53d84464b7a84e222d439d6df034629dc7caed9b36af96a02b53

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