Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1479110e62d7f0…

MALICIOUS

PDF

65.3 KB Created: 2021-02-16 16:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 42c980a0deebb9020ddb1cc64c771133 SHA-1: 790a4fb0d1c09c22f29ff6afb909ace1aaea16a0 SHA-256: ab1479110e62d7f0f159ad1284512e6fbc92f38cfc67c3eae2f0b1abb833cfd1
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, with the latter detecting it as 'Pdf.Phishing.Trojan'. The PDF contains an embedded URI pointing to 'https://baarspo.ru/wix?keyword=knicker+knob+stable', suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

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://baarspo.ru/wix?keyword=knicker+knob+stable PDF link annotation
    • https://cdn.sqhk.co/furafurume/7XK6omI/bugopodoxobifon.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/RgejhDu/hocus_pocus_witches_brew_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/gwCSb2I/vativumoleberidesoka.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jjmDvc2/baby_skins_for_minecraft_pe_download_invisible.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/7id6Zha/installer_mod_skyrim_vr.pdfIn PDF document text
    • http://fepafotejidug.iblogger.org/96745404381.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/jfhfsA7/86218598916.pdfIn PDF document text
    • https://cdn.sqhk.co/moradivovep/ahgjgOd/49760504031.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/9o3jcU3/72473436307.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/8Fjchfc/44892747019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapijapixezido.rf.gd/hockey_jersey_template_illustrator.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/pumeniwidimixavefu.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/aristois_hacked_client.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/chlamydia_treatment_cdc_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/bolton_council_tax_support_form.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_off0000c547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC547 4964 bytes
SHA-256: 91171cd15b74f8505bd6237b5ee86b9c29090d72a74cfac1669afec6234f62ea
font_01_sfnt_off0000d63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 10088 bytes
SHA-256: 823a9008576d0203947c9fc5cbf4ea291447b20946834f8d8bab99350fe9a69c

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