Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a976bde04025ee…

MALICIOUS

PDF

98.1 KB Created: 2021-03-20 04:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: beb30f050494be93760f1f30e25637bd SHA-1: 465070d04c57f1cc227da6557be3598772365c10 SHA-256: c0a976bde04025eeb63a02e5e0eb9edf00fc3ba886c2287f5b8356bcd1fff5ae
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm, indicating a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. The embedded URLs, such as https://crophysi.ru/strik?utm_term=reiki+level+1+attunement+symbols, are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=reiki+level+1+attunement+symbols In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_604b54116a6f5.pdfIn PDF document text
    • http://fusavexupisedi.iblogger.org/23450278541.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/tunopumil-xawaxuzovakub-fedaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fd3af0237f83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371246/normal_5ffcd22edffeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_6046d5af5537d.pdfIn PDF document text
    • http://busibear.com/8528484571waloh.pdfIn PDF document text
    • http://vibuluvizawo.66ghz.com/how_to_render_a_minecraft_world_in_blender.pdfIn PDF document text
    • https://jupuwova.weebly.com/uploads/1/3/1/4/131409597/434643.pdfIn PDF document text
    • http://meetcabinets.xyz/bts_chicken_noodle_soup_songgbdk7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5fd2e0ef39991.pdfIn PDF document text
    • http://markettop.pro/cuisinart_ice-30bcp1_ice_cream_maker_2-qt_silver_manualpsjf1.pdfIn PDF document text
    • http://sokolov.fun/exercicios_barroco_e_arcadismop4x0g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xapijifas/petit_nicolas_animation.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/suzuki_sidekick_off_road_bumpers.pdfIn PDF document text
    • http://labopum.rf.gd/greatest_common_factor_worksheet_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/kufefalo.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/60543497869.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/black_metal_albums_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/50826215593.pdfIn PDF document text
    • http://terefikug.epizy.com/kodawadepobijesuzizelapax.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/86455295434.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/juego_gentilicios_provincias_de_espaa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13757 5044 bytes
SHA-256: 9b0647e8d906c00aaae943e2b356a8aeda1a4db8e32be3eaa295f1ed11edcd3b
font_01_sfnt_off00014879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14879 10664 bytes
SHA-256: 186515d15eb4f1750b6f0251214fbf3eef966eec4f2bc8dd11b9ceb70cff488d
font_02_sfnt_off00016d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D00 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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