Malicious PDF — malware analysis report

Static analysis result for SHA-256 05621560a0b6dec7…

MALICIOUS

PDF

74.2 KB Created: 2021-03-07 17:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0f9cefaf5705c50251c804cfe4a51a98 SHA-1: ee374a7cb953b01622335478a615e3b5b8963c3a SHA-256: 05621560a0b6dec78ebf18d8603b538444b09c1868ec7e34ba7ced2750faabab
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to suspicious domains, indicating a link farm or distribution mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://golowaki.ru/strik?utm_term=c%2523+programming+interview+questions+and+answers+with+explanation+pdf PDF link annotation
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/5954355.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/fG49Kji/tawokarefugabaleketikima.pdfIn PDF document text
    • https://cdn.sqhk.co/bejadelu/igqggjd/rumiworotajoveba.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/how_to_cut_my_micro_sim_to_nano_sim.pdfIn PDF document text
    • https://lawatekuvux.weebly.com/uploads/1/3/4/2/134265731/zidematezumupe_boxika_wuwedugujelido.pdfIn PDF document text
    • https://lulotabo.weebly.com/uploads/1/3/4/7/134745182/91ae11f6a4.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/did_you_get_it_spanish_worksheet_answers_level_3.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/55946095885.pdfIn PDF document text
    • https://musevupuli.weebly.com/uploads/1/3/1/4/131438528/8008573.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/xubofavizerozov.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/cihHQgj/67807862249.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/69732c02-39f5-48a0-8c3e-9cebefa66520/18680910288.pdfIn PDF document text
    • http://fanalejowegop.atwebpages.com/wavudizinusitiwilete.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/cpn_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/86471533064.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/windows_dual_boot_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412920d9-7d3e-4ac9-989a-419a6d118019/the_magicians_season_2_cast_imdb.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/alchemist_android_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/91557631246.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/fuzuwuvijadogobojemepu.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/21647937423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc0dc23-6bc9-42cc-aab3-bda58d371f58/how_to_sync_harbor_breeze_fan_remote.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_off0000e940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE940 4064 bytes
SHA-256: a7ba64f301e596f3813fbdba42f4d10ba7ca3c4c4084d08a71c9ae320d82a630
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 10932 bytes
SHA-256: 7755a43916e18ce06292bcdaf362d6fb03bdcab11fcce8960332f56f7558f5d2

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