Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbebd56daeb188a7…

MALICIOUS

PDF

78.5 KB Created: 2021-03-26 07:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a43ad0d0375958ac1e0b098dcc8211de SHA-1: ef0d1cfced847fca151755da4e6a860720c74c9f SHA-256: dbebd56daeb188a7fe4b313619e1d3b0e8b2167991bdcf1461ee2eb75b27b0f2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including one pointing to 'resalured.ru', which is flagged as a potential phishing or malware distribution site. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, suggesting an attempt to create a link farm for SEO manipulation or to host malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=the+sense+of+an+ending+kermode+pdf PDF link annotation
    • https://cdn.sqhk.co/bebetirifam/hbpNtzx/40374977660.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/jjGievo/selujofolabodiwov.pdfIn PDF document text
    • https://cdn.sqhk.co/fakujodi/ghibfFO/superzings_hero_truck_monster_roller_pojazd_superbohaterow.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/p6VxSha/jufarewuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/sadejolevevojug.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/dell_inspiron_530s_motherboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ebba7a5-56af-4b6e-9261-420a0e66eed8/chicco_nextfit_zip_max_vs_graco_4ever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30abd8df-1d3e-4106-9c28-c8d6e725c673/55968037611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54028d45-eb4f-413a-bf67-2ee867967c93/pawazofefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1158c0-1be7-48f5-9e84-c66b6815a64d/how_to_reset_a_babel_slot_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73e2020-bdfc-49bb-a053-2670a8ffa636/how_to_check_ink_levels_on_hp_printer_6978.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_eaab39b2bb2d439795f1298cc8592187.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/finest_girl_bin_laden_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/java_swing_sample_program.pdfIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_f7aa1c9e91e04b8f87caa0be67ee0658.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/android_news_app_source_code_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/878fda01-0bb7-41ff-afa0-3b3d1bc94229/poworo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d6a59a8-f371-4144-b6f5-69031b184806/my_husbands_secret_wife_lifetime_movie_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/is_the_baby_bullet_microwave_safe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ff9574-2bb6-4160-ad57-86e4a22025e1/how_to_make_a_pallet_jack_go_up.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/59419215754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014cbc40-763c-4658-842d-c992685b6c7b/john_deere_l110_automatic_deck_belt_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/wow_classic_blacksmithing_gold_making_guide.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_off0000f5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E9 5436 bytes
SHA-256: 6fa680aa43ccefbe8509709400d9e77202a6babff995b85b77ff6bc05e19fbd5
font_01_sfnt_off0001083d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083D 10552 bytes
SHA-256: cae0385fa6fe30d19d95ade2e68e461e9aaa8057fdd7a36dffed11041df65b2f

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