Malicious PDF — malware analysis report

Static analysis result for SHA-256 120eb06862a4d3f4…

MALICIOUS

PDF

77.4 KB Created: 2021-03-31 22:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4396e25857ef1bc9fb59ce845e79f3b4 SHA-1: b0ee1fb2c99e13ab18492c0e25999e130ab904a6 SHA-256: 120eb06862a4d3f45717b0e97185ed5cc4a47cf2c2a71b878482fcc6521a1b89
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'carbohydrate metabolism steps pdf'. The presence of embedded URLs and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dafemum.ru/award?keyword=carbohydrate+metabolism+steps+pdf
    • http://polizoriv.iblogger.org/norevirugelalitobutil.pdf
    • https://cdn-cms.f-static.net/uploads/4370066/normal_60199208ecc29.pdf
    • http://sokegex.mywebcommunity.org/la_boite_a_merveille.pdf
    • http://bomaduworofa.medianewsonline.com/rosugibutenena.pdf
    • http://lazisirogabidir.mypressonline.com/25268133492.pdf
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/xozevolusofexax.pdf
    • http://sazinoz.mypressonline.com/1981006437.pdf
    • http://tedurelaseji.mygamesonline.org/flight_itinerary_sample.pdf
    • http://zabemaladameg.medianewsonline.com/40201402000.pdf
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/c34eac43.pdf
    • https://kedaweva.weebly.com/uploads/1/3/4/8/134895813/kifuvizadapesikowomo.pdf
    • http://vuroxinizona.scienceontheweb.net/abbyy_reader_free_download.pdf
    • http://rowowevu.mypressonline.com/1137296695.pdf
    • https://sumokexopusoval.weebly.com/uploads/1/3/1/3/131378975/12387e6.pdf
    • http://xawamiwupajev.mygamesonline.org/tonepipopin.pdf
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/17b273a.pdf
    • https://cdn-cms.f-static.net/uploads/4369775/normal_603ae7e2d6697.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zopimejumujodeb.rf.gd/apa_format_bibliography.pdf
    • http://juludiripo.myartsonline.com/tasaletumumomenedugofa.pdf
    • http://weduzugeri.rf.gd/manual_single_head_aluminium_profile_cutting_machine.pdf
    • http://sesoxevanadike.epizy.com/coliforms_in_swimming_water_acceptable_levels.pdf
    • http://bopisumeku.atwebpages.com/cbse_class_10_topper_list_2020.pdf
    • http://xajebanexored.epizy.com/a_modest_proposal_answers_key.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_off0000f255.bin
e0847cd9c1793e65994b0ab5629fc98b20c56a6655da207eafab4a5a31864c99
pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 5428 bytes
font_01_sfnt_off0001049d.bin
012271f67f7cf48572fe11d4ac986d9f39a5087a21fdc9f71b1ee1e52ffe9ad9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 10376 bytes