Malicious PDF — malware analysis report

Static analysis result for SHA-256 996f5a68a1f689e9…

MALICIOUS

PDF

77.0 KB Created: 2021-02-28 02:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 306a3e10d78639228e8c55eaec1e20df SHA-1: faeaa8ff2eec3c3c789f80f27193d4f014766c5c SHA-256: 996f5a68a1f689e975f00482a963ec6dfcc7bd799335ea8ba19e851c5ffcbe8c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as `https://cdn.sqhk.co/vopupevomate/Xheenji/real_racing_3_mod_apk_ios_2020.pdf`, are likely used to host or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=list+of+low+fodmap+diet+foods
    • https://cdn.sqhk.co/vopupevomate/Xheenji/real_racing_3_mod_apk_ios_2020.pdf
    • http://vitofemegawe.getenjoyment.net/gixipemeguvibunil.pdf
    • https://takogazaka.weebly.com/uploads/1/3/4/0/134017011/nukesonatoxupidobi.pdf
    • https://sitevipisojorop.weebly.com/uploads/1/3/4/6/134639105/zasatudupu.pdf
    • http://site-shop.xyz/48795518440c3bjj.pdf
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/8099541.pdf
    • http://lisolu.org/vokaxorojusimisag1dt9g.pdf
    • http://money-team.site/cdc_zika_virus_guidelinesa7i4p.pdf
    • https://cdn.sqhk.co/faroziwe/cijghge/17670408435.pdf
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/kuzarifarovulosebeb.pdf
    • http://choosemadam.site/fetetoruxolevupareweddgms.pdf
    • https://cdn.sqhk.co/jimevexir/3icfhhN/corona_nachrichten_handelsblatt.pdf
    • https://cdn.sqhk.co/dabozijide/Ihigfje/super_ninja_in_virginia_beach.pdf
    • http://mapotilij.mygamesonline.org/a_long_obedience_in_the_same_direction_review.pdf
    • http://buloshnaya.site/31520721626lspay.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woxorojero/69780543396.pdf
    • https://s3.amazonaws.com/banula/15475219373.pdf
    • https://s3.amazonaws.com/nabifovu/newataxotosej.pdf
    • https://s3.amazonaws.com/magapeguwabe/ashish_patil_all_audio_songs.pdf
    • https://s3.amazonaws.com/mipeboro/bicycle_the_definitive_visual_history.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/cue_card_topics_2019_with_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f068.bin
9babd3f5b482535ab2da53a02727cc6bb7196ba1dcc19d39fb41fafaa40f4e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 5124 bytes
font_01_sfnt_off000101e0.bin
a794a9d1c3976062b9f5505793e806decba023875d15ec215c699751db00e1a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 10808 bytes

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