Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a70cc7df03f1bfc…

MALICIOUS

PDF

83.0 KB Created: 2021-03-22 10:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1b2561599b2adc041827df1f8ec36d07 SHA-1: 1a32d6025b42ef4287637ecc6088ddf4bf503643 SHA-256: 1a70cc7df03f1bfcdf92033edd939dc439c1c31e32846166ade95196acc5752d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_INVOICE_LURE' suggests a deceptive intent, further supported by the document body referencing a 'chemical families worksheet'. The presence of embedded URLs and the overall structure indicate it's likely a phishing or scam document designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://kuzutuzo.ru/wix?keyword=chemical+families+worksheet PDF link annotation
    • http://talekibof.22web.org/81793698034.pdfIn PDF document text
    • http://onlinetiser.website/gonevejarhhakw.pdfIn PDF document text
    • http://govnosiakxws.online/icd_11_complex_ptsdaksas.pdfIn PDF document text
    • http://1xbets-reg.site/puzanusisap3zeka.pdfIn PDF document text
    • http://vitrinachel.ru/kegubujefukokenarusub3uf2v.pdfIn PDF document text
    • http://werenntaq.online/49128577753olawx.pdfIn PDF document text
    • https://cdn.sqhk.co/fojufifef/2IMu9ji/fajutuxel.pdfIn PDF document text
    • http://indir-kazan.com/kavasinovurinuvinzlz8e.pdfIn PDF document text
    • http://copyrightviolationcenters.com/hoodoo_bible_magic_download3cmdb.pdfIn PDF document text
    • http://apsdd54gfv.xyz/pokemon_movie_in_hindi_full_movie_i_choose_youul0pl.pdfIn PDF document text
    • http://kalavar.xyz/12983758465h44p1.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/jishhhj/play_arcade_the_king_of_fighters_2003.pdfIn PDF document text
    • http://tehnotop.space/upkar_speak_english_fluently6zvmz.pdfIn PDF document text
    • http://apsdd54gfv.xyz/pokemon_movie_in_hindi_full_mIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilelinib.rf.gd/phenomenological_approach_definition.pdfIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_55c945e6e5b34610912d3a56c2af8e63.pdf?index=trueIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_2631db0b0b554c98982507245a982702.pdf?index=trueIn macro / runtime command snippet
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_d813cd72600a4258804c7609c50dab51.pdf?index=trueIn PDF document text
    • http://xamazaxalezamat.rf.gd/borescope_inspection_report.pdfIn PDF document text
    • http://jopumogezev.epizy.com/88791282195.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_933b9fcd416c4bd58b7e9803daf59ec1.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_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 5180 bytes
SHA-256: 358fda7a412f255ecaad85406354bdc1d30c89d5abd01506b20ba2437023f417
font_01_sfnt_off00011976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11976 10972 bytes
SHA-256: 65cd722dc228f51beb8629afcdb2d272304ac06bb9300ebc8a999dc97cb8dd00

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