Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f2701e3a798fda…

MALICIOUS

PDF

79.1 KB Created: 2021-02-18 20:25:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bba72ef42fb227ab066a60e85362b166 SHA-1: 7cfcf7f7cc98dcc981041a96f813b7f75c564928 SHA-256: 65f2701e3a798fda4b1d11ed16bfce912cb0633397c9de8ac0562f2d6d04c52b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as legitimate content. The document body, though heavily obfuscated, suggests a lure related to a technical issue ('My roku 3 remote won't pair'). The presence of a PDF_SEO_LINK_FARM heuristic and a high ML score strongly indicate malicious intent, likely to direct users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jacksth.ru/123?utm_term=my+roku+3+remote+won%2527t+pair PDF link annotation
    • https://cdn.sqhk.co/wifopuzuxiba/lhhchhq/kiduwenisuxigurawap.pdfIn PDF document text
    • https://daradila.weebly.com/uploads/1/3/1/4/131438164/5934555.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/wivurodin.pdfIn PDF document text
    • http://likododolokopaj.iblogger.org/97131957387.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/KEjfUDm/58291807448.pdfIn PDF document text
    • https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/tugixelulawikam-gakew-donipevedobidu.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/fivigexoneku3wzlm.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/cgdgRhb/island_king_tenelle_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/6KtPo0c/90035122064.pdfIn PDF document text
    • http://delojenopow.66ghz.com/strike_blood_2_sub_indo.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/kagedatabujo/46047240424.pdfIn PDF document text
    • http://nopuxawox.epizy.com/teori_ekosentrisme.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/bengali_movie_i_love_you_song.pdfIn PDF document text
    • http://gogotetiv.rf.gd/spelling_bee_word_list_grade_7-9.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/free_powerpoint_flowchart_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/grammarly_premium_for_word.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/4786427933.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_off0000f7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AF 5216 bytes
SHA-256: 1f59419cc2b8e47b081cc124fad0e4bcc56ef728148292632b1bebf7a5275d71
font_01_sfnt_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 11108 bytes
SHA-256: 61fca090689e23d97661dd0e19c011cb330e506a1b73e5718464d57a8e201363

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