Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4d80f3e802b730…

MALICIOUS

PDF

75.6 KB Created: 2021-04-01 02:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b0f35ebcbc4e276e61ad24eb1045ac36 SHA-1: 77e1d8031e73f112fbcc4f04ea3252872cdea6a7 SHA-256: 1d4d80f3e802b730010355f4c6bb242d9cdff0c91ddcb32e7943d075b4531b50
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are to Weebly and other hosting services, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious content, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the intent to direct users to potentially malicious external sites.

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://soxebez.ru/strik?utm_term=sample+intercessory+prayer+examples PDF link annotation
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/7255091.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/71348405021.pdfIn PDF document text
    • https://cdn.sqhk.co/kulamogo/cidyGji/guwugoge.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/4744976.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/b63e187917111f3.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/iaghEgc/call_of_mini_zombies_apk_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/3Dhfaji/47854745374.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/fanasejubukata.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/GicHF8g/theater_crystal_lake.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/adjectives_of_character_exercises.pdfIn PDF document text
    • https://vifojozajo.weebly.com/uploads/1/3/1/4/131454549/d8aa02de8aa.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/1bJ3hgT/find_my_phone_samsung_galaxy_watch.pdfIn PDF document text
    • http://lanujozawodu.sportsontheweb.net/barrett_esophagus_pathology.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/aVijkgc/tufenutasemigevaza.pdfIn PDF document text
    • https://duvilututumek.weebly.com/uploads/1/3/1/4/131437385/musivamirezi.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/Geaihji/commander_in_chief_definition_president.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/makumapikeze/gst_books_for_ca_final.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/bissell_pet_carpet_cleaner_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/20084454540.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/34867546530.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/38971807399.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/credit_analyst_resume_template.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_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 5352 bytes
SHA-256: 312f76dfd1cf14c2d9d7412e63b3c67a2e85463db804a5cf0b75568e72d4a073
font_01_sfnt_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 9656 bytes
SHA-256: 464c2e403546abc3e8020d50fd82ca2272372860f85ddd9a16aa76dd015b0b92

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