Malicious PDF — malware analysis report

Static analysis result for SHA-256 9852c25254b70dfb…

MALICIOUS

PDF

68.0 KB Created: 2021-02-14 02:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 80232ceaa56a5d5aac716144fc9b3c65 SHA-1: acfd2708d5858378a70ad91b337a2764584d3d95 SHA-256: 9852c25254b70dfb2d33c42ec350578cc75f2ac691111ef59327fbb14732a31d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a large link farm. The document body, though heavily obfuscated, appears to be a lure related to a weather report. The presence of multiple external URLs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/aws?utm_term=ongole+weather+report+for+15+days PDF link annotation
    • https://cdn.sqhk.co/remimidotomi/icifhg8/download_sup_multiplayer_racing_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/fotinegataso/thj71gd/begawasitaxidakagewuvuwu.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/5752706.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/hflnhiS/zamokejerilemaniwazama.pdfIn PDF document text
    • https://cdn.sqhk.co/jujirepak/gfNjiig/mebunojevogepenoxivun.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/dijijH1/kijunezur.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/E3fihgq/switchback_energy_chargepoint_merger_date.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/ygisEOP/70063677742.pdfIn PDF document text
    • https://kefexogutifega.weebly.com/uploads/1/3/5/3/135309882/kuzosiroxelib_lazegeker_vuwaxoxigiluwig_rabixizegi.pdfIn PDF document text
    • https://kebedemozi.weebly.com/uploads/1/3/0/7/130775588/5312765.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/1iahe6X/nifudapexiwitevoxisozovug.pdfIn PDF document text
    • http://xozonline.ru/fiche_adquation_formation_emploi7zcaq.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/Fuagi83/sniper_fighter_combat_elite_force_shooting_game.pdfIn PDF document text
    • https://sekotujuf.weebly.com/uploads/1/3/5/9/135960234/5be316aed6666.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/gd8ggjf/kid_rock_hit_songs_list.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/jijumupade/marathi_ganpati_bhajan_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/3d_parallax_background_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/vikezafozajetodaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/jukoboridevajovejipetid.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_off0000cba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA5 5700 bytes
SHA-256: e9089204b9fbede3ac9208584bfad7b5122f7f029ba3d59e107521938c7397bb
font_01_sfnt_off0000df28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 10492 bytes
SHA-256: e8da0368d320d9a5eb9542808d87493b366a357005f5dacd5c16108cd9cb202e

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