Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1114aac708b2766…

MALICIOUS

PDF

72.6 KB Created: 2021-04-18 14:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 79908331a46d1f5b8242a200e1a8831e SHA-1: d7751890dcc5f13916a679cfc1fb486657160705 SHA-256: d1114aac708b27664c80eaf8c2c5bc93578d3e0525e6b803a440e961702f0686
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 0.9996

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://jacksth.ru/strik?utm_term=poulan+pro+pp4218a+parts PDF link annotation
    • http://verifiedbadge-lnstagram.com/depivapubalawuvudu4bihq.pdfIn PDF document text
    • http://yarrebitteh.online/cheppave_chirugali_full_songs_telugus3flt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464315/normal_60000a52802b0.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/sex_magic_manifesting_maya_2010.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/h4ifjeT/good_fishing_spots_around_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_604bbc9a41c86.pdfIn PDF document text
    • http://igcopyrightverify.com/design_of_mechanical_systems_bookmkf70.pdfIn PDF document text
    • http://b0xberry.online/tuxiwovum4yux.pdfIn PDF document text
    • https://cdn.sqhk.co/jozanafe/ghmyp9u/famivuposomobuxasugepug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5ff56dba2b74b.pdfIn PDF document text
    • http://opensol.xyz/ansul_fire_suppression_system_trainingfbd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_60568cfaae998.pdfIn PDF document text
    • http://vidclips.design/cfa_institute_level_2_exam_weightsohxqi.pdfIn PDF document text
    • http://meetsucre.pro/the_story_of_your_life_matthew_westvauid.pdfIn PDF document text
    • http://negifowutagur.mygamesonline.org/boris_akunin_azazel.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/iigC8jg/xesitetufebatifogapumu.pdfIn PDF document text
    • http://azalea.store/nikon_d5100_camera_battery_price994fr.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/825f0ccf-f5d9-4ab0-8ecc-a2efd7435402/smith_and_wesson_standard_catalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba8ab26-b6ca-45ad-a005-d08174b12f0a/object_oriented_analysis_and_design_text_book.pdfIn PDF document text
    • http://wumugajus.onlinewebshop.net/how_to_replace_samsung_j3_charging_port.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a75513-982f-465c-9b1f-c34c74889d85/innova_3320_auto-ranging_digital_multimeter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd124e8-8c91-4c6b-b2b0-4a5de005d60e/fundamentos_de_marketing_digital_google_activate_respuestas_modulo_3.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_off0000dcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBB 5280 bytes
SHA-256: 0c16795fee0092472ae8d7417d9b06539ff06927e2c12d451b8bac299328587e
font_01_sfnt_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 11340 bytes
SHA-256: 54b48ed8610818f1921ec34c5fb730a277ab4c890399afcbaba7b323b2d01da7