Malicious PDF — malware analysis report

Static analysis result for SHA-256 247cacddee8f0362…

MALICIOUS

PDF

84.4 KB Created: 2021-03-26 17:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 36bc1692958d5a976861447e246efab3 SHA-1: 102e0d3bbf77b5d41e82ced4fb629ef6e84c69bf SHA-256: 247cacddee8f03629f815498da4d762f2c2f2618e3701597c46eb142b9e2833c
184 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=updated+periodic+table+of+elements+pdf In PDF document text
    • http://itclick.pro/large_star_template_to_cut_outo9gn6.pdfIn PDF document text
    • http://kinorio5.xyz/ottlite_stopped_workingfva8q.pdfIn PDF document text
    • http://my-favshopd.online/rafodujonobe07qgp.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/juxigusaruraljrf0.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/uhahcjh/axis_football_2015_game.pdfIn PDF document text
    • http://tehnikator.ru/sabertooth_x79_upgrade_bios5w6q2.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/jvOxhcO/xejobozebame.pdfIn PDF document text
    • http://taher-tcac.com/online_property_valuation_reportajzhu.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/after_12th_science_courses_list_pcb.pdfIn PDF document text
    • http://best-ital.fun/33706643955ztn52.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/what_is_bq_in_construction.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/Zr3teii/fazezozezitepazut.pdfIn PDF document text
    • https://cdn.sqhk.co/xupebasolaw/f1hPpKe/21317503490.pdfIn PDF document text
    • http://smartcreditcheck.info/lotro_scholar_guidepgg44.pdfIn PDF document text
    • http://brumbum3.xyz/echo_srm_2100_weed_eater_partsbzvw3.pdfIn PDF document text
    • https://cdn.sqhk.co/vigamodijek/jNAKbGp/ray_tracing_algorithm_in_computer_graphics.pdfIn PDF document text
    • http://iciko.xyz/maths_magic_tricks_with_answers97bus.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/696746d2-b608-483d-b2ed-031ce6e1f468/jogisoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa8d520-6e79-4f26-ac1f-7dc62fa4dc36/d_d_4e_best_feats_for_wizards.pdfIn PDF document text
    • http://bukezodebas.onlinewebshop.net/tidex.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_7b6c5e95b99c4d409de5528f709943f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6863f381-46a0-458d-b0b1-4f2b36b2235a/86007113851.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/lepifeletaneguzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf36a8a-3810-446d-a082-16750415ec03/eyelash_extension_course_online_melbourne.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/geotechnical_engineering_principles_and_practices_2nd_edition_free_download.pdfIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_625e201673c0465b9ce38cea0942b426.pdf?index=trueIn 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_off00010940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 5432 bytes
SHA-256: b9ea14e4684989d79f41703954220a0cdadfc1edfdb8ab3fedfd51e8b5bcc830
font_01_sfnt_off00011ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA3 12020 bytes
SHA-256: ae8417e9a24b8fd801d080a99ad11583b9626c704974d3eb054b3e1a7119e5da