Malicious PDF — malware analysis report

Static analysis result for SHA-256 3956ab19ab9ad975…

MALICIOUS

PDF

79.3 KB Created: 2021-04-06 13:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 072b0607e42879e53b01e21d81b65a22 SHA-1: d263f5b856bbe58eae3828a1e7b05920a0bb7952 SHA-256: 3956ab19ab9ad9750cd058da7b822d17b65bed2eea7d3e0cfd73274358822c46
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming scheme. The PDF structure and embedded content indicate an attempt to disguise malicious links within seemingly innocuous document metadata.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=girl+with+the+dragon+tattoo+movie+2011+cast PDF link annotation
    • https://cdn.sqhk.co/jukowejazus/fgdZ7TK/press_your_luck_online_game.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/28439646621.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/refopu.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/40987956235.pdfIn PDF document text
    • http://daliadiago.com/60701738059roobx.pdfIn PDF document text
    • https://cdn.sqhk.co/renonidofel/A1WEqgi/orange_tree_resort_orlando.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/qTgfheP/home_network_switch_vs_router.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/bernardo_stamateas_heridas_emocionales_gratis.pdfIn PDF document text
    • http://noverst.xyz/sudopebsgzab.pdfIn PDF document text
    • http://padojobimo.mywebcommunity.org/nisapivumozupuditibi.pdfIn PDF document text
    • http://price-list.moscow/911506438000ic8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_4de2d1841c924f38ab115f9135556a0d.pdf?index=trueIn PDF document text
    • http://xevemifura.rf.gd/clasificacion_de_los_virus_animales.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_624d3609a94d413e96c7aaae599ce1f5.pdf?index=trueIn PDF document text
    • http://dipibezepipes.rf.gd/deloitte_digital_marketing.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_5564f8d5b5d944a8b030212b6989ee15.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_d87005875b9a4f08aa6127d3286709ac.pdf?index=trueIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_c29c6bbde58d4d45a3572c388228d674.pdf?index=trueIn PDF document text
    • http://jefelaxe.epizy.com/candle_light_song_video.pdfIn PDF document text
    • http://fulapokop.epizy.com/64465753693.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 5864 bytes
SHA-256: 41444f5a9c8b4dfa4d26b86352ae52d5c971dadef4da429459b5bff7d44e6880
font_01_sfnt_off000109b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B6 11300 bytes
SHA-256: 62a27b1d2e4e49a5b4cdddc14dad62505ecec8651ebb33dbbec8b3bead2f71eb

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