Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e2accfa91690de…

MALICIOUS

PDF

97.6 KB Created: 2021-03-05 03:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7f3318662a639d0864df198445f9a166 SHA-1: b1273310cbfe2e483837e38c3390cee0c7964ab5 SHA-256: d9e2accfa91690deba88df9b5b914a67bf18514ddf2392632ed3c3220d59d35c
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially obfuscated, suggests a lure related to search queries, likely to trick users into clicking the malicious links. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/wb?keyword=canterbury%20tales%20miller In PDF document text
    • http://noxugimeto.iblogger.org/37334580125.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369161/normal_60055936d8790.pdfIn PDF document text
    • http://susurrus.space/one_piece_bounty_rush_androidn9lqa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422638/normal_5ff1e3444c279.pdfIn PDF document text
    • http://kinokaiff.space/74586538747sauhf.pdfIn PDF document text
    • http://lazadacostumercenter.com/shakespeare_sonnet_15bf8qt.pdfIn PDF document text
    • http://xanarixumafiju.iblogger.org/92926337961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_6038b50066543.pdfIn PDF document text
    • http://itawegan.fun/how_often_replace_shop_vac_filterhufp9.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/f21d672e-99c2-4cdc-bbcf-13ca1af9ee41/fipepusagelenov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2c6411-ee65-4998-a876-216111b54570/unitypoint_urgent_care_west_des_moines_iowa.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/betty_azar_understanding_and_using_english_grammar_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0170452-9255-42d4-bd74-a995ffff7c36/57482670273.pdfIn PDF document text
    • http://wupotatide.rf.gd/na_ullukulla_chakravarthy_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab95a5a-8699-4417-8273-f4fc89c82428/29079192933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec23137-8207-49c3-a200-58b3e241e9bc/68604650639.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/36957813558.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/16909078960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6e449cd-4c36-4fed-86fd-2ede35953b93/quelques_connecteurs_logiques_en_anglais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c77b213-9f50-4229-aa4d-f88aa3520704/how_to_get_payday_loans_to_stop_taking_out_money_from_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4aba76f-81c0-43e2-9b26-fb03e80220a4/how_do_i_get_a_satellite_view_on_google_maps.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/android_admob_get_test_device_id.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/37123566939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0811a0-21bc-4ce4-83b4-c7e72f474872/what_is_culture_journal_article.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/good_food_guide_hobart_2019.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_off000142f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F0 5012 bytes
SHA-256: b9504bfc7dd241026d82748e24435ef07fd0a10d92011829b9c01b3def843b13
font_01_sfnt_off000153ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EA 10616 bytes
SHA-256: a3f4a68189f6651a56d307a39f2e94a3ee8b79623b4adbeb79e8aa624d4a82d8