Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c8d2f4f0874c6c…

MALICIOUS

PDF

74.4 KB Created: 2021-03-16 16:02:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a22f69931346768c0860ee799036e4f SHA-1: 15daed5896aa75fbc235fb33c601805233cd4659 SHA-256: 84c8d2f4f0874c6c5c4ff55955e75723d45c1bfec4f7ece72cb00bf0e2f69fbb
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is directly referenced by a heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a Dutch environmental term, suggesting a lure. The primary attack vector is likely spearphishing, with the embedded URLs serving as the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/award?keyword=besluit+bodemkwaliteit+pdf
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/xigane-geximogugifejub-lopufujum.pdf
    • https://cdn.sqhk.co/vomifavafo/eibhgig/printable_sudoku_puzzles_easy_1.pdf
    • https://cdn.sqhk.co/zumovinej/eiihah0/vetikigawuliwiwu.pdf
    • http://tronreserve.online/
    • http://wekeb.space/e_number_saudi_visa_checkdrhsq.pdf
    • http://duxojiz.iblogger.org/pikudaborinawufuko.pdf
    • http://onlyforyou.space/what_is_a_mega_neon_pet_worth_in_adopt_meamzci.pdf
    • http://beststudent.space/ticket_to_ride_europe_map9uo5o.pdf
    • http://remont-pc.website/pictionary_words_hindi_moviescizv9.pdf
    • http://uber-global.com/581574554782wi33.pdf
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/rigut.pdf
    • http://opsnatur.fun/najanodanm3dxo.pdf
    • https://reborugavuzak.weebly.com/uploads/1/3/4/7/134736286/dutom.pdf
    • https://mofixeridivekux.weebly.com/uploads/1/3/1/6/131606419/7691297.pdf
    • http://robot3.site/5638386y1dcv.pdf
    • http://haifaiv.ru/kofepakosaxblb9.pdf
    • https://nitegira.weebly.com/uploads/1/3/1/0/131071289/lovidi.pdf
    • http://zdorovienashevse.xyz/dew_point_and_relative_humidity_lab_answers9jhbd.pdf
    • http://bioforce-co.site/50336785539pl20k.pdf
    • https://cdn.sqhk.co/gemukojev/i1didjc/52476314552.pdf
    • https://cdn.sqhk.co/ritasuxa/69cdjhi/recarga_para_cuba_desde_el_exterior.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fibotemirazopo.rf.gd/sample_biodata_for_marriage.pdf
    • http://tuzuvas.rf.gd/number_line_to_10_000_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e772.bin
de14edd13dd148d1a918b22090bc1661f6bc6a070934bfcf3bc9f2276ab5e174
pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 5436 bytes
font_01_sfnt_off0000f9ed.bin
0a14c498af62438625a6eab50ce74239e6251069278839680d275bc2efb9c264
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9ED 10236 bytes