Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8220438a4c14d7d…

MALICIOUS

PDF

75.5 KB Created: 2021-04-16 16:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c5f8820c9879d460ef22c4ee34e3186d SHA-1: 508e6b7e7a618e63c5dd9d110feec98fb60ea419 SHA-256: e8220438a4c14d7db3270f49ac076a72fe5fe6be29284cf09d601160575f9fda
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://xezojetit.ru/strik?utm_term=formula+de+volumen+de+prisma+rectangular PDF link annotation
    • http://bukobaxaz.getenjoyment.net/emotions_and_feelings_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/gigifojorax/bHjejgc/tobejafesavuwimeve.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/what_color_represents_slavery.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/tenefiwomunizevomurox.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/YForrii/75326439344.pdfIn PDF document text
    • https://cdn.sqhk.co/dubagelojuwe/hh6ePhc/100_best_boxing_games.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/annuity_sample_problems_with_solutions.pdfIn PDF document text
    • http://d-youtube.com/introduction_to_sociology_seagull_ninth_editionn41la.pdfIn PDF document text
    • http://bitcoinov.site/478340094327dwm4.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/fgtgeig/rexapu.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/siwixomudit/ripibaxozu.pdfIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_4b88fb99a8b3428898b2592ae15d056c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fifomi/free_online_acoustic_guitar_lessons_for_beginners.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_d86751f8b4f240fd8b655ef2c5f39e24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/92410053560.pdfIn PDF document text
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_6756a2adf85444e88ecc49e0382d0483.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_dcd9ab25aa474de5a8f892768d977cfb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/how_many_amps_is_the_hoover_elite_rewind_plus.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/el_sacrificio_algernon_blackwood.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/carer_allowance_payment_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/camera_360_latest_version.pdfIn PDF document text
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_bf0a5540f47a4cff958a05443dcc63fc.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 5408 bytes
SHA-256: cd7092f0b0e3781a7f9a76f43d44debc968e0fc75ebb7cec36a4de7f1c7b420b
font_01_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 11724 bytes
SHA-256: 54224009e34687c9b6b6ae5e740472e85cc3dd6c10f4decdce9e0c3d1792ee39

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