Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d781f1114a31c11…

MALICIOUS

PDF

66.7 KB Created: 2021-02-24 07:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: be1ab8e188d7ba5b23a177e8e550f367 SHA-1: 483579a0b822f44535f69c6cff429fc4cb4c843a SHA-256: 1d781f1114a31c112cbd5f6c1e99ff2f200f8518f41dac5d570b0d73ed3d54dc
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when accessed, redirects to a search result page on 'jacksth.ru'. This URL is likely part of a phishing or malicious redirection scheme, aiming to trick users into visiting a compromised or malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wb?keyword=petrychor%20apocalyptic%20witchcraft PDF link annotation
    • https://cdn.sqhk.co/dejijadu/bJ2Hahj/jenikinepopunuta.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/ajeieLI/30908930621.pdfIn PDF document text
    • http://zuluwana.iblogger.org/brown_sugar_2002_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/rotogogoji/md1ujfY/28535755058.pdfIn PDF document text
    • https://cdn.sqhk.co/jegivoziba/ij9Ujep/planetary_alignment_2019_november.pdfIn PDF document text
    • https://cdn.sqhk.co/molofagaji/j02aggk/vixenu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484169/normal_5fdd6eec2d0dd.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/sosupejuxofedo/5917235365.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/95087918183.pdfIn PDF document text
    • http://zoxokukazo.epizy.com/46073287620.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/jomokovolorupufalewizu.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/54076716413.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/bifivuzetovu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/74715755445.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/aquarium_shark_fish_images.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_off0000c9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D0 5120 bytes
SHA-256: 5c73e741498df569c2b2579670e55a3ca01beb2729cec43c753d498688343a7d
font_01_sfnt_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 10220 bytes
SHA-256: 1aed434c6210c4a0a9406bf6dbb88115744af98d58a1e61d88d1465de2ffa3b3

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