Malicious PDF — malware analysis report

Static analysis result for SHA-256 677eeb7061d5b4f8…

MALICIOUS

PDF

82.6 KB Created: 2021-06-06 09:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 22aa22a6c6d7a2ac0b53b8bebc31907e SHA-1: d1513f1dee980abc2aceefe4a2e01ba651ad9e53 SHA-256: 677eeb7061d5b4f868efc93759c4bbe7d5f6dc18410909f709256de01786a122
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or spamming campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://cructi.ru/pbw?utm_term=how+long+is+the+isee+lower+level+test PDF link annotation
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/voxozekanidona-mevesajuvotobar-joxomez-kadude.pdfIn PDF document text
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/levivekunasite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_605f0b758e562.pdfIn PDF document text
    • https://sujoxiwu.weebly.com/uploads/1/3/4/8/134879933/61d54be4eaa4b7b.pdfIn PDF document text
    • https://mawafusujomadil.weebly.com/uploads/1/3/5/3/135351104/wubemijojow.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/3c748979a0d8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454170/normal_604a7bc64283a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutopar.pbworks.com/w/file/fetch/144550980/adding_subtracting_multiplying_and_dividing_fractions_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a7fbd1-3efb-4eac-9441-4e2f86f7d345/pokemon_emerald_randomizer_download_gba_rom.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144444105/gigigemidimedafaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c82ff83-7541-4dcd-a81d-adfd96977f13/bamexad.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/f/dodirobuvi.pdfIn PDF document text
    • http://juvupumanut.pbworks.com/f/zegutovelenekagotixidojod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2889fe83-ab6b-462e-95a4-0943daf7a019/surah_al_mulk_full_mp3_free_download_mishary.pdfIn PDF document text
    • http://jujupaw.pbworks.com/w/file/fetch/144553719/acunetix_web_vulnerability_scanner_free_download_full_version_crack.pdfIn PDF document text
    • http://rilewikem.pbworks.com/f/flexible_cystoscopy_nice_guidelines.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/fufabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b19521-ddcf-469a-8aa0-7786ce6dcc42/where_do_i_find_stock_option_symbols.pdfIn PDF document text
    • http://xibosini.pbworks.com/f/migexiwekekibasag.pdfIn PDF document text
    • http://nanefumipopo.pbworks.com/w/file/fetch/144569670/madeline_book_series_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae003cf-aaa2-47d3-9269-4e9ccca37d87/champion_7500-watt_dual_fuel_generator_reviews.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/70905011332.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/w/file/fetch/144663846/13464803884.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_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 4848 bytes
SHA-256: f8690e52c6d5c2a286f75df321d4a3dced5c9dfa5c190caaa8cdec6262e64e41
font_01_sfnt_off00011720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11720 11172 bytes
SHA-256: 567099ce602a6c2a9d7f9eba5a62e6969035f238ea327306dc57f022ce88a328