Malicious PDF — malware analysis report

Static analysis result for SHA-256 1347ea47fb697e58…

MALICIOUS

PDF

86.1 KB Created: 2021-03-31 08:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63b1de086675e35cbb527449fea64af4 SHA-1: d1fc89cb4ab4cbb0fbd01a0bd58c2d3cf4ea14e7 SHA-256: 1347ea47fb697e58f71b069462f64259241f1ed49ba96251ce7625481008a417
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were extracted, the presence of numerous external URLs, including one with a suspicious domain, points towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://soxebez.ru/123?utm_term=ff14+leatherworking+guide
    • https://ramenenute.weebly.com/uploads/1/3/4/5/134591972/7443991.pdf
    • https://wizakamulo.weebly.com/uploads/1/3/4/0/134017688/finox-koxemuroj-duridopuwak-mejepo.pdf
    • https://gavuvikiji.weebly.com/uploads/1/3/4/6/134674568/turidovexado_monudu_tiselela.pdf
    • http://roverebi.22web.org/pediatric_blunt_abdominal_trauma_guidelines.pdf
    • https://vimixake.weebly.com/uploads/1/3/1/1/131164471/fenuju_rabajinepino_begaberovimodi_jilasu.pdf
    • https://latelolinowom.weebly.com/uploads/1/3/5/3/135333312/xakutu_fugenowuka_bosiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/8150292d-71ba-4e29-a6fd-6dfafc177b7a/gusugi.pdf
    • https://s3.amazonaws.com/zodawanuror/pinasunixajikixepudizuguf.pdf
    • https://uploads.strikinglycdn.com/files/b09864a9-ef57-445f-99c8-cc174d3415c9/metodologia_de_la_investigacion_cientifica_valderrama.pdf
    • https://s3.amazonaws.com/tokafanawa/konica_minolta_bizhub_363_user_guide.pdf
    • https://s3.amazonaws.com/nosepevozux/sigilodutipasibavugubajus.pdf
    • http://sizesetuxuw.rf.gd/centrifugal_casting_journal.pdf
    • http://ganubigeponato.rf.gd/curacao_tourist_map.pdf
    • https://uploads.strikinglycdn.com/files/07509bf1-35bd-432f-9f2e-43e4f7cf7e26/abu_garcia_black_max_rod_casting_weight.pdf
    • https://s3.amazonaws.com/rumezo/90551294903.pdf
    • https://s3.amazonaws.com/suzixegazunow/bible_reading_plan_new_testament_old_testament_psalms_proverbs.pdf
    • https://s3.amazonaws.com/pidufozu/36411151851.pdf
    • https://s3.amazonaws.com/zedilegol/how_much_to_fix_samsung_charger_port.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/dusabefuram.pdf
    • http://rosuwofa.rf.gd/amyloid_fibril_formation_chaperone.pdf
    • https://s3.amazonaws.com/wexoteluwag/65870483502.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010568.bin
af2ccfeeb6f2e999dfd9d2e963b2f81602ce0eb552b89672a3603b02a24e613a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10568 5124 bytes
font_01_sfnt_off000116eb.bin
94f5c932def022e5f261e496aca652daa1c813ac17904e60088d3970fc2cf407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116EB 11036 bytes
font_02_sfnt_off00013c9a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9A 4324 bytes

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