Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ba25c56546ed40…

MALICIOUS

PDF

99.4 KB Created: 2021-03-20 13:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d4e7f9501ee0b49cb7852fee0f1a2cc SHA-1: 5976fb486b20d44142d183120eaf8d52cffcf14f SHA-256: d0ba25c56546ed40726785de12d43dae4a1eb27831171d90385d0bc266aa6d6e
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 0.9987

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://lozipotod.ru/wix?keyword=chapter+56+ap+biology+reading+guide+answers PDF link annotation
    • https://cdn.sqhk.co/jipodipotaj/if6ieje/final_fantasy_iv_advance_rom_download.pdfIn PDF document text
    • http://dreamingdeveloper.com/8366697539184a10.pdfIn PDF document text
    • http://fufodew.22web.org/42884051459.pdfIn PDF document text
    • http://blubadgehelp.net/balkrishna_industries_ltd_annual_report_2016-_176bkv9.pdfIn PDF document text
    • http://hookup668.site/vokekexemanugelikji.pdfIn PDF document text
    • http://uuuuull.space/divixuxoxabetovubizoniroru425.pdfIn PDF document text
    • http://topvideo.design/jemeloxwxbxj.pdfIn PDF document text
    • http://dostafood.xyz/set_it_up_imdb_parents_guide8dpg2.pdfIn PDF document text
    • http://fishing-rods2.club/38679397530f2p2e.pdfIn PDF document text
    • http://zupibupiju.iblogger.org/shimano_deore_dx_shifter_manual.pdfIn PDF document text
    • http://inostrana.com/toyota_echo_2003_owners_manualdd74o.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/dKxPk7S/ap_european_history_textbook_spielvogel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guwitus.epizy.com/hush_hush_song_lyrics.pdfIn PDF document text
    • http://bilozepe.rf.gd/rizimeruluduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00569646-d817-494b-b946-80bf4d33f894/english_literature_teacher_jobs_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372255f0-effa-4ccc-8973-1afee0e76201/elder_scrolls_online_pve_builds_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4575832-2990-49d7-8dce-9370cd777ee6/tuzovelijapinurekisosan.pdfIn PDF document text
    • http://bijigojufapoda.epizy.com/animals_images_in_png_format.pdfIn PDF document text
    • http://ribaxekag.epizy.com/ruroduselux.pdfIn PDF document text
    • http://pomagupivedib.epizy.com/63658145556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e051b77e-f409-4ad0-8286-8437a066fbea/murray_14.5_hp_42_riding_mower_belt.pdfIn PDF document text
    • http://romufadi.epizy.com/anorexia_y_bulimia_pediatria.pdfIn PDF document text
    • http://gasoxesa.rf.gd/fumopebetosewupuwepibopa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F3 5740 bytes
SHA-256: 8d0fced4f37fcc46b39aecf906457b6532581e5b66f97503215e211114a5989e
font_01_sfnt_off0001457a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457A 10604 bytes
SHA-256: ca0c479a61c6044e2ed31f6ca8fe9231bbbf40c97def948efb08ce56e201a5fc
font_02_sfnt_off000169f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F8 16132 bytes
SHA-256: 82f7aa4fef2cd90733ed84ef1d81c041b15990b82a49830089245cc24b586ea2