Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3ce03bc8ee3130…

MALICIOUS

PDF

78.6 KB Created: 2021-03-03 04:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8fffb3e987571b5f1edf0b0c8cb82daf SHA-1: 00057011423ab843b79cd9888a5daa94d5452106 SHA-256: 1a3ce03bc8ee3130ce00bbc7c49e75a422388f85547445bf4c74146d13bd6e58
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though obfuscated, contains a URL that appears to be a lure for a paint application guide. The presence of embedded URLs, including one that is likely malicious, suggests the document is designed to redirect users to a harmful site. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=how+to+apply+sherwin+williams+dry+erase+paint PDF link annotation
    • https://wumudirega.weebly.com/uploads/1/3/4/5/134515906/majodikuw_toburone_petoxeweg_tugedotofol.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/3761764.pdfIn PDF document text
    • https://sorafenime.weebly.com/uploads/1/3/4/3/134320910/31bc0e8a100178c.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/KQhdggj/65519938938.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/acgdhid/42765415738.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/romeo_and_juliet_act_3_scene_2_line_47_allusion.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/jhbA2jb/pet_rescue_saga_download.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/jomaregobadutexal.pdfIn PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/3cdd6b8.pdfIn PDF document text
    • https://cdn.sqhk.co/jufulezamuko/ZDxCoem/marxism_and_socialism_similarities.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/liability_waiver_release_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/turepejalaretomejegol.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/anomalisa_movie_480p.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/febad.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/the_fall_of_the_house_of_usher.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/kulekanonolamenenatoradax.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/tom_clancys_splinter_cell_double_agent_java_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/69676484901.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/char_broil_oil_less_fryer_rib_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/fagimog.pdfIn 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_off0000f246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF246 5356 bytes
SHA-256: 402f62d1c9a2691d953335fedf563bd5bdf58e13e67acfdc53966c06682b8505
font_01_sfnt_off0001045f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045F 12420 bytes
SHA-256: 2563c15911f930212b135813538df983d56b90e868fac3eea38cc43eec93c831

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