Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c7069efd85552fc…

MALICIOUS

PDF

75.3 KB Created: 2021-03-31 11:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 554af86b89b75e7c07511f2fad10258b SHA-1: 94e757907bc13bdec1c5cacdaf0860fb160cc0c6 SHA-256: 4c7069efd85552fc4e9d505c95e5b49402baa7d84c4b50a0e144c2a727f6f97d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical ClamAV detection indicating it is a phishing trojan. The ML classifier also strongly flagged it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure malicious links within a large number of redirects. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://leonvi.ru/award?keyword=barbaric+rites+pdf+download PDF link annotation
    • https://cdn.sqhk.co/fimirexuf/ejhghjS/lafibob.pdfIn PDF document text
    • http://hookup750.website/watch_cnn_live_online_freefaezi.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/aWIsjL8/treasure_hunter_games_free_online.pdfIn PDF document text
    • http://vovpomnim.ru/actron_cp9125_error_codesxpn1i.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/ickTige/iron_stickman_rope_hero_fighting_gangster_crime_apk.pdfIn PDF document text
    • http://dogusiwimukames.iblogger.org/crystal_oscillator_design.pdfIn PDF document text
    • https://bipilebel.weebly.com/uploads/1/3/1/6/131606150/rusuxupowelek_sorukano.pdfIn PDF document text
    • http://xinumazujo.iblogger.org/small_fry_lisa_brennan_jobs_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/ggogddh/scp_6789_siren_head_sound.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuzijix/jh3RGjj/oscar_pistorius_girlfriend_jenna_edkins.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/rokopofepilizuz.pdfIn PDF document text
    • http://remontlegko.info/punuvotaramale5byfy.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/6750567.pdfIn PDF document text
    • http://nout-prodat.site/matidufetesirotudegubaxodksbz6.pdfIn PDF document text
    • http://basvuruizleme.online/rulubiwepugakisediligx92ys.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/711f9ba45.pdfIn PDF document text
    • http://twoup-viktoria.online/sahih_bukhari_in_urdu_jild_1rt890.pdfIn PDF document text
    • http://azakalaza3.xyz/85807396187c12n4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zomimek.epizy.com/87072907661.pdfIn PDF document text
    • http://wuseruri.rf.gd/m_audio_oxygen_49_mercado_libre_venezuela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d542522-553b-4d65-96bf-9169e782e2e9/xawewifelenarej.pdfIn PDF document text
    • http://valogaberel.rf.gd/calzada_romana_cercedilla_informacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7e528a-5e33-45b9-92a0-79d3ab74aeee/coldest_town_in_the_world_siberia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbdb669-1415-43a4-9261-9f1d4ee81dcc/how_do_you_pray_for_world_peace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a24075c-d095-48c6-9f07-c59df0381408/defying_gravity_meaning_in_tagalog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 5220 bytes
SHA-256: 29484e090aa063412ce09eccdfda9e92e83a933d96e08d8ffeb8bbf752623851
font_01_sfnt_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 11420 bytes
SHA-256: be4b81b9c6701e8d10811b3fa371d32d178b6fb8a2e4f4e02f2ad179d0b4e362
font_02_sfnt_off000111a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176