Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0764ba307f38c4…

MALICIOUS

PDF

77.0 KB Created: 2021-04-03 22:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a670afc551df4f4c05f875b99fc37383 SHA-1: 54709d6d28c72abec3e07718ced676ae3a4dc027 SHA-256: 4e0764ba307f38c4819882d47b02ab992afb8f7b54df1e2be8bc13dda7a86126
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The PDF_SEO_LINK_FARM heuristic indicates the presence of a large number of external links, likely intended to manipulate search engine results or redirect users to malicious sites. The embedded URL 'https://bologen.ru/strik?utm_term=waterpik+water+flosser+costco+reviews' is a primary indicator of this activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/strik?utm_term=waterpik+water+flosser+costco+reviews
    • https://cdn.sqhk.co/jebixusugak/Enihpgj/wanoxalatitiw.pdf
    • https://fetenove.weebly.com/uploads/1/3/5/3/135330361/8059711.pdf
    • https://wojewifonutej.weebly.com/uploads/1/3/4/8/134883442/2176935.pdf
    • https://cdn.sqhk.co/gupimupiset/Kjbigi6/dogs_slayer_task_osrs.pdf
    • https://cdn.sqhk.co/wugunifikezu/hcLzjdJ/skipping_rope_near_me.pdf
    • http://bagadiwep.22web.org/19296996074.pdf
    • https://cdn.sqhk.co/melipetoluf/CibgcPZ/zoxugumufizi.pdf
    • http://govakokes.22web.org/tatalaksana_mastoiditis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xujitezu/oracle_database_disaster_recovery_plan_template.pdf
    • http://tozegebefile.rf.gd/dell_optiplex_390_manual.pdf
    • https://s3.amazonaws.com/kovilowab/26309445516.pdf
    • http://jaxojuru.rf.gd/malinconia_ninfa_gentile.pdf
    • https://s3.amazonaws.com/baxekojojexusol/razesufaxek.pdf
    • http://merizipu.rf.gd/observation_vs_inference_worksheet.pdf
    • https://s3.amazonaws.com/pibajuwi/jamozobipizifatimikiwa.pdf
    • https://s3.amazonaws.com/jutenojamega/ambili_vettam_malayalam_song.pdf
    • https://s3.amazonaws.com/rodakarugupoko/chess_board_game_free_for_mobile.pdf
    • http://bukaduxanob.epizy.com/dodevapirigef.pdf
    • http://ligededeju.epizy.com/barcelona_vs_liverpool_first_leg_formation.pdf
    • https://s3.amazonaws.com/petikamov/pivudorelimipazekux.pdf
    • http://tipakofixu.epizy.com/anagram_magic_square.pdf
    • http://ximumipos.rf.gd/how_to_connect_printer_to_wifi_hp_deskjet_2630.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_off0000e085.bin
2e5672d8daeee728d8f5b6615a00b6da0b2635c9e7bcaba0c3bc33db3ae00217		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 4920 bytes
font_01_sfnt_off0000f16e.bin
00b372b25c7be04e34d788024d572cfd0e825579d11edf541827bd24a5a1ef4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 11400 bytes
font_02_sfnt_off00011852.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11852 4324 bytes

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