Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f10df711e908510…

MALICIOUS

PDF

83.0 KB Created: 2021-03-20 19:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 54dfa78da9ec7c3838fb3a4fda2c8e83 SHA-1: 5567fe5bae186d3a4292b4c361f74fae4b4b33c5 SHA-256: 4f10df711e9085103d9a27d0531d2e7d9bdbfc6d203422d0d47d9aba30a3f6ea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://bologen.ru/strik?utm_term=how+to+do+shadow+work+pdf PDF link annotation
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/732e86.pdfIn PDF document text
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/4465178.pdfIn PDF document text
    • https://nopefulewipedu.weebly.com/uploads/1/3/4/3/134314682/8946344.pdfIn PDF document text
    • http://grandov.pro/can_you_use_sae_30_instead_of_10w302x4xn.pdfIn PDF document text
    • http://criticcxck.space/clasificacion_y_definicion_de_las_cuentas_de_balance_y_resultadosd54eg.pdfIn PDF document text
    • http://energierecrute-emplois.com/target_beats_studio_3_grey1dt2z.pdfIn PDF document text
    • http://sneakerspapa.store/vogobogedekuxilizp22.pdfIn PDF document text
    • http://ergors.space/present_perfect_continuous_exercises_advanced_levelbuyou.pdfIn PDF document text
    • http://smartycredit.info/vegetable_side_dishes_for_thanksgiving_dinner0pu7h.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/61506695110jw4ky.pdfIn PDF document text
    • http://twirlini.com/lozikamidudovug2tgrc.pdfIn PDF document text
    • http://fridgeservice.ru/can_i_use_my_roku_stick_without_the_remotehi29l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/186ce99a-96b1-4810-a95e-58150cdb9f5f/maxupejebijipenevupod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce186bd2-31f4-4f23-9780-819889e78940/mary_poppins_book_ending.pdfIn PDF document text
    • http://lagidifej.rf.gd/race_car_aerodynamics_designing_for_speed_free_download.pdfIn PDF document text
    • http://gepaboveron.epizy.com/the_shining_sequel_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14022363-3f47-4bb1-96d2-36f25b1ca461/2005_mercedes_e320_cdi_service_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/gigabyte_aorus_z390_pro_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/bloody_roar_5_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139e2bc2-05f0-4ddb-83d6-7a29762e6425/medium_salted_caramel_hot_chocolate_dunkin_donuts_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/report_of_cioms_working_group_ix.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/90510948896.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 4732 bytes
SHA-256: e59c2113bb2383e11600e9ee77c1fbf0f15bb45edd6b4a3a7ed2aa2a2b450339
font_01_sfnt_off00010932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10932 11516 bytes
SHA-256: 0998e2a55d6106082b300cefe9c1046cf1a084e4ccb87a73e21ceb69fe2a36f0
font_02_sfnt_off00013089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13089 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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