Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd7da0e1c47b95e…

MALICIOUS

PDF

80.9 KB Created: 2021-03-16 16:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59f6172bd4a60059ac34f2a5ae28d9f3 SHA-1: 2948f0cdd218c09cc3b06dfb93b9e9e37e47738b SHA-256: 1fd7da0e1c47b95e2bad84b7af619504fb89861348648f5606f5866c778ef479
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate document downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or trojan payload. The document body text, though heavily obfuscated, suggests a lure related to free PDF downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/award?keyword=data+analysis+using+sql+and+excel+pdf+free+download
    • http://kowojolajamuv.getenjoyment.net/suzezelepu.pdf
    • https://cdn.sqhk.co/mekibekowufe/jdjdZgg/best_fonts_for_scripture_tattoos.pdf
    • https://sowotelimavo.weebly.com/uploads/1/3/4/0/134000290/fapajodof-jenufab-wabejadofevu.pdf
    • https://cdn.sqhk.co/jipodipotaj/aUuLDGw/64666740429.pdf
    • http://poxumanavofeboz.scienceontheweb.net/70792874534.pdf
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/buzeribur.pdf
    • http://siviveko.getenjoyment.net/what_are_parallel_structures_in_writing.pdf
    • https://cdn.sqhk.co/tawavumazo/gJhdjd9/zenomuvamawexi.pdf
    • https://cdn.sqhk.co/vuvesanap/gjiaezv/disukafakor.pdf
    • https://cdn.sqhk.co/gabazumad/0DifhhP/egg_free_pancake_recipe_thermomix.pdf
    • https://cdn.sqhk.co/wanadujogo/gioicjb/dragon_quest_builders_2_restaurant_not_registering.pdf
    • https://cdn.sqhk.co/pajokiman/iKI7jb0/super_ninja_nickelodeon.pdf
    • https://cdn.sqhk.co/tagodepa/3xirLjb/59220019297.pdf
    • https://jinunogafexaxim.weebly.com/uploads/1/3/4/8/134884933/e7e27e5b03.pdf
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/vazuwiwopagedulobil.pdf
    • http://sogixusi.medianewsonline.com/43353017450.pdf
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/jonov.pdf
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/9093648.pdf
    • https://paboripiniw.weebly.com/uploads/1/3/0/7/130739049/00d57d3bbe1c26.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://labazorev.rf.gd/warabegokasimatugef.pdf
    • http://molagegivijoxu.onlinewebshop.net/calendario_escolar_2020_20_sep_mexico.pdf
    • http://zuluvegutadetu.epizy.com/zekexeje.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_off0000f99c.bin
778247e81d08708933e492a3491e3cc31ab1dde84adb30f8de744ec6e1ad2df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF99C 5708 bytes
font_01_sfnt_off00010d41.bin
6257edfce866d98f724ce157d91146c6f4df680433ca0f7eb4d8888e6b3b91fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D41 11868 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.