Malicious PDF — malware analysis report

Static analysis result for SHA-256 708c6794da40bb58…

MALICIOUS

PDF

87.7 KB Created: 2021-03-01 01:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 52f72fbdea954707666bf1dfc3f6cc8b SHA-1: a15ffc733d5eb1139aa8399b21af36e61ad94efb SHA-256: 708c6794da40bb58d857a42e46b3f467aabc70c3061e9bba2cb6d1c1dea77e7e
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'xajibur.ru' and a visual download button lure suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://xajibur.ru/strik?utm_term=english+to+gujarati+dictionary+book+free+download PDF link annotation
    • https://cdn.sqhk.co/jimevexir/AEZdhii/wumokuwa.pdfIn PDF document text
    • http://podenepusow.22web.org/what_is_the_main_theme_of_the_poem_harlem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426408/normal_5fcdb24ad3128.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/peter_drucker_managing_oneself.pdfIn PDF document text
    • http://molipetofokeva.22web.org/11298434912.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/gmhjjgf/94299512500.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/17188019808.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/hcbhd5z/arena_swimming_goggles_cobra_ultra.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/igLfXda/halloween_candy_run.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/juzewojavomofew/xifiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/fekuz.pdfIn PDF document text
    • http://werapitagu.rf.gd/44673723549.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/beginner_piano_pop_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/67687585682.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/kagemadakigimi.pdfIn PDF document text
    • http://budakofis.epizy.com/82213554158.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/75871305487.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/20714450677.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/69918691577.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_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 5596 bytes
SHA-256: b82c263c493853313bf6369382ed3eb4653bdac073ce4d669dba0fa5c25dd71a
font_01_sfnt_off000119db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DB 12452 bytes
SHA-256: ce3225e10206435ff6afe7a89608294999264df96bfdb03cdfc73e07fe3e2ced
font_02_sfnt_off000142f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F6 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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