Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fada7112afc471…

MALICIOUS

PDF

71.9 KB Created: 2021-03-30 23:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5a4065f146fbfc6fa2d2d0884837867 SHA-1: a4dc92da9dfc0f746bb558746437df59ce6a4581 SHA-256: e5fada7112afc4713649daa5fcf51b607a6e0905447a9fd2b41267bc04d13307
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of external links, many pointing to SEO-optimized PDF documents, suggesting a link farm or redirection mechanism. One of the primary external links, 'https://jumiwimov.ru/wix?keyword=gir+robot+plush', is likely used for phishing or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=gir+robot+plush
    • https://lobepujijas.weebly.com/uploads/1/3/5/9/135966441/jekuzodod.pdf
    • http://dixojele.22web.org/neato_botvac_d3_brush.pdf
    • https://cdn.sqhk.co/motuwezelu/gdmjbig/okay_synonym_informal.pdf
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdf
    • https://xomijati.weebly.com/uploads/1/3/5/3/135329577/5257805.pdf
    • http://sodahq.pro/diary_of_a_wimpy_kid_movie_rodrick_rules_casthw5tj.pdf
    • https://cdn.sqhk.co/vibisidumes/diafRhf/vmware_horizon_client_login_as_current_user.pdf
    • http://handler-autoscout24.com/at_t_u_verse_channel_list_los_angeles9v14s.pdf
    • https://cdn.sqhk.co/kumotuxijufu/jeaGjeN/numberblocks_hide_and_seek_gameplay.pdf
    • https://cdn.sqhk.co/jafetegupam/qbjdhet/zulotukamal.pdf
    • https://cdn.sqhk.co/subesanodag/gggijfV/7086554508.pdf
    • https://cdn.sqhk.co/kipezipilojo/5gdi9Fx/my_etisalat_online_registration.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kegubinefuda/shimano_di2_dura_ace_electronic_groupset.pdf
    • http://devobajevigi.rf.gd/sid_meier_s_civilization_revolution_strategy_guide.pdf
    • https://s3.amazonaws.com/viwoxuz/al_que_esta_sentado_en_el_trono_partitura_piano.pdf
    • https://s3.amazonaws.com/rewepalazamiso/gofevimirufika.pdf
    • https://s3.amazonaws.com/pizexopenaxu/76829661627.pdf
    • http://wadatenut.rf.gd/wipugujanebe.pdf
    • http://wevevaviz.epizy.com/38250065381.pdf
    • https://s3.amazonaws.com/jadudusujuje/dangling_and_misplaced_modifiers_exercises_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d30b.bin
87262879a7285327af2250313412b15c3758d60b8e01136c360111b3c0f437e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD30B 2900 bytes
font_01_sfnt_off0000dd5e.bin
53f2dc6f6a80d913a256ddc02f225505fa66742df78a70324abfea7d248695ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 4868 bytes
font_02_sfnt_off0000ede3.bin
e425c060a7e3cdec1cd557b74a0fa50729a7cf396393eabaae027c60ef7913d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE3 10288 bytes

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