Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95d60baf2d9c765…

MALICIOUS

PDF

75.0 KB Created: 2021-06-07 00:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 29eb479260c807aa138fd86aa94456df SHA-1: 0a835a884bf6f9721b1e3fafef14a0efc339b4d1 SHA-256: b95d60baf2d9c76526be77ff1aa47bab9fbe709dd31ac577a7ab7770d1bdd377
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://garglob.ru/pbw?utm_term=synaptics+touchpad+driver+windows+10+32+bit+lenovo+ideapad+330 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5ffb961724f0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_6056afb0a62ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_60361d822a397.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/8795b448-5294-4e9f-bd7f-596969e3efe2/beautiful_chaos_meaning_in_tamil.pdfIn PDF document text
    • http://xuwuziz.pbworks.com/w/file/fetch/144510615/8_ball_pool_download_for_pc_windows_7_filehippo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2723d3c4-2b6a-4b38-b758-9c658eaac0be/john_deere_42_inch_snowblower_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb6539bf-fbe1-4790-8622-714dbdd86bfa/ark_artifact_of_the_massive_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8778c69c-baea-43b5-b862-1cc874e93e79/english_spanish_translation_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b741aa9c-ff12-491c-aecd-2a5b84f26522/60346368274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f05179-bbab-4ca3-b3be-0662361c3021/29181838553.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144553863/mutant_creatures_mod_1.15_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936f3a5a-eb4d-44a8-86bd-dd3de040336f/hernndez_sampieri_metodologa_de_la_investigacin_6_ed.pdfIn PDF document text
    • http://wodotazisib.pbworks.com/f/turarep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7945abda-df36-49ae-8d51-c8a60c0bb56c/how_to_place_tens_unit_pads_for_neck_pain.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/f/liril.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/f/zikikewamewufominavijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374238e1-81e0-4bb2-93a5-d6d88fce470e/why_does_my_bird_smell_like_maple_syrup.pdfIn PDF document text
    • http://bopidix.pbworks.com/w/file/fetch/144682785/lamentables_datos_animales_bebes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc14675-1ace-44a2-80e9-485196cb9a0c/waburanonukakeviwadawik.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144751074/4619284049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5241c1f-1152-4543-b700-72073678befd/15309047252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e16e2e-f8f5-47d2-8ec6-254f97141795/tamazetoworutezadapi.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_off0000e2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 6148 bytes
SHA-256: aec767966e87454d5c2ee99087b1891a107a2779f38093437b6c3dc130b64448
font_01_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 11888 bytes
SHA-256: 58b50bd4e374ca1a13422c0ac95e1e02d5cec9cb11c46f367d2ce35e5c5016bf