Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda118a12489f79f…

MALICIOUS

PDF

68.8 KB Created: 2021-03-14 01:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3b9f6d3195e081538c988ab0c53dbc03 SHA-1: 38160956c6cbac6f0dcea3f8856bf126f2b3fde0 SHA-256: dda118a12489f79f099af80c42759c2c12fc8af84f19c7abe2853ef0b0603d17
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://crophysi.ru/strik?utm_term=inter+tel+glx+phones PDF link annotation
    • https://cdn.sqhk.co/laxefotogulo/piejDN4/2048_drop_and_merge.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/mhjibuK/pikezepibegavaj.pdfIn PDF document text
    • https://cdn.sqhk.co/fenogate/mPlBxrA/tally_accounting_software_with_gst_free.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/best_coding_books_for_beginners_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/b2Bibjh/zipasunuvijawubuxav.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/Bijzhes/is_raid_ant_spray_safe_for_plants.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/btjcJjf/21830934394.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/JhfxgdL/flik_flak_football.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/jidq0fv/village_viking_fortnite_saison_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/388fb33e-ab62-4195-a245-700dcf661a3a/how_to_read_and_understand_law_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86251a2-34f6-423f-94a2-2498291f1d2b/jizupizageju.pdfIn PDF document text
    • http://tolimimagag.epizy.com/can_we_kiss_forever_remix_song.pdfIn PDF document text
    • http://wezekopufoj.rf.gd/how_to_answer_sorry_for_the_delay.pdfIn PDF document text
    • http://gegepemu.rf.gd/animated_gif_in_interactive.pdfIn PDF document text
    • http://gisoxurosi.epizy.com/23603534938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ce419f-b59b-493d-a78f-37e270524a65/how_to_use_yeti_mic_on_ps4.pdfIn PDF document text
    • http://dubanexotokegel.myartsonline.com/kanazapevegizor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ffa7d1-fd31-4724-8090-1c5380e98c85/how_to_use_presto_pressure_canner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b2b8fe-517d-4734-bfc1-5b33a2551cc5/mainstay_computer_desk_assembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b34f87e7-eb13-44ff-bf51-435dab142d39/vazaniwuwuriwemajakotat.pdfIn PDF document text
    • http://tikikenuf.epizy.com/50782932623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529670ad-3a51-413c-b86c-ab4ecdcd9e1c/can_i_study_for_the_gmat_in_one_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4937eec-d255-4e8f-982f-6d6fa0575394/gubuzigopejadepipewa.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_off0000d1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E3 4876 bytes
SHA-256: 70ff45351f328513bab7277bd440121c3caea3c1b44da7620d4a1a3532ff1e03
font_01_sfnt_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 10472 bytes
SHA-256: e9f49f4c1b1421ad2152f388d6e76414caa9e7b97d28c1bd9a846a3394506aab