Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5aad0b4fdb60f33…

MALICIOUS

PDF

80.1 KB Created: 2021-02-23 08:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 85b2282a7815da6682aafbd3db029c91 SHA-1: d96bb090c783fa183dc146775a205af0cfdb520f SHA-256: e5aad0b4fdb60f33cdc920e0ca092341738d1d293003c14d68b8c73a006ad76f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to S3 buckets and other domains, forming a link farm. The primary external URI, 'https://maypoin.ru/wix?keyword=lotro+minstrel+healing+build', suggests a lure to attract users interested in specific content, likely to disguise the malicious intent. The ClamAV detection and ML classifier strongly indicate maliciousness, consistent with a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=lotro+minstrel+healing+build PDF link annotation
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/7276065.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/xizifaz.pdfIn PDF document text
    • http://rujawobezixevib.iblogger.org/2351911935.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/9005389.pdfIn PDF document text
    • http://tiktoktop.design/friction_stir_welding_project_reporton7l9.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/gavutalora_widoxebo_jekidof.pdfIn PDF document text
    • http://beststudent.space/wugaduja67b3o.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/kesumasaka/pavukikobowaponexizizi.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/boring_life_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/34025354711.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/dj_bukan_kaleng_kaleng_planet_lagu.pdfIn PDF document text
    • http://pidejekakej.epizy.com/nephrotic_syndrome_treatment_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/57983222398.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/mutadexixujavi.pdfIn PDF document text
    • http://guzuwepazuw.rf.gd/tedamegijotogezupi.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/belkin_n150_password.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_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 5320 bytes
SHA-256: 2e678131fe0c5ca5badd4759525f70342df75ab880d470e8be2cfc891b4399ce
font_01_sfnt_off00010fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBD 10436 bytes
SHA-256: 0b9f50bde1cbfeb723d3026f29971cc3d85f63430d56b3452c63e6ebd02aa08a

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