Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c2df12f0e2ad05…

MALICIOUS

PDF

71.6 KB Created: 2021-03-19 21:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02ad5bf1643ed1e6366735b3847ead02 SHA-1: e14b7effa0e7d2607c18aa306b6d67790b0506fc SHA-256: e4c2df12f0e2ad0555945612af12fd78a49451cb80bf2e06015e338d491f5566
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to artificially boost search engine rankings. The primary malicious URL identified is 'https://dugedepap.ru/strik?utm_term=hp+5520+printhead+cleaning', which is likely used for phishing or to serve a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=hp+5520+printhead+cleaning
    • http://newuwedeza.mypressonline.com/dragon_ball_super_manga_chapter_66_preview.pdf
    • https://zudobusida.weebly.com/uploads/1/3/5/3/135330479/3809555.pdf
    • http://zufutefej.22web.org/ada_mp1_classic.pdf
    • https://minezutoka.weebly.com/uploads/1/3/2/6/132695516/wekugoletal_vexadapu_zalerexuv_giluvamis.pdf
    • https://cdn.sqhk.co/wakewafo/h6Zwfhd/roberts_portable_dab_radio_cd_player.pdf
    • https://cdn.sqhk.co/zaviresodew/eidiaKQ/15988488089.pdf
    • https://cdn.sqhk.co/dufadafakuti/je6TRhi/esc_guidelines_hypertension_2018_pocket.pdf
    • http://gedadekenoz.mywebcommunity.org/alcohol_abuse_essay.pdf
    • http://gakemuxuk.22web.org/surajomimiperufup.pdf
    • https://sajozigita.weebly.com/uploads/1/3/0/8/130814351/waxebon.pdf
    • http://rorogudadusosej.getenjoyment.net/ap_budget_2020_20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c9e7fc94-8789-40a3-966c-18f145b17f54/the_magicians_imdb_trivia.pdf
    • http://puzegekizizovin.epizy.com/twitch_emotes_zip.pdf
    • https://uploads.strikinglycdn.com/files/e4ebda6e-0bd8-4d9c-97a7-582cb9ef100c/who_plays_robin_in_man_about_the_house.pdf
    • https://uploads.strikinglycdn.com/files/2b7d2f90-aa19-4c2a-ac0f-8a8cf2d33191/ravujajakilozisibeguwagun.pdf
    • https://uploads.strikinglycdn.com/files/089b48c2-7f69-4889-ad9d-3ce4f48d32db/77997883102.pdf
    • https://uploads.strikinglycdn.com/files/b278ca0b-a9b5-430c-8df3-f02cfb920ddb/jededakaruf.pdf
    • https://uploads.strikinglycdn.com/files/56c2230e-30ab-4564-b289-58e5f63d7429/queen_of_shadows_tv_series_petition.pdf
    • http://subokizal.epizy.com/westinghouse_outdoor_timer_with_remote.pdf
    • https://uploads.strikinglycdn.com/files/1e1c977f-a37d-451a-af39-f56c310e6bfc/how_to_use_eureka_forbes_vacuum_cleaner_demo.pdf
    • https://uploads.strikinglycdn.com/files/3bb78747-c1f8-4af1-ad0b-a0fcb81d36e0/the_strongest_steel_is_forged_in_the_hottest_fire_meaning.pdf
    • https://uploads.strikinglycdn.com/files/4e5b7ecf-1b7c-4604-966c-3221e71c908b/36149237297.pdf
    • http://memamawu.onlinewebshop.net/4591721482.pdf
    • http://jobifizokugo.rf.gd/resuscitation_council_uk_guidelines_abcde.pdf
    • http://gakamaxoluzes.atwebpages.com/belgariad_free_download.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_off0000da21.bin
138b524d910d78d03faed11de5864eacdd56466a6a95b308f6f4e3a41b21383e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA21 5516 bytes
font_01_sfnt_off0000ece6.bin
b48cac469a2fd0ed8336d3d79123141826c29648b062aff24b769d7b3716f0db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 10520 bytes

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