Malicious PDF — malware analysis report

Static analysis result for SHA-256 db544aab33e0c0bd…

MALICIOUS

PDF

82.2 KB Created: 2021-02-23 17:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 981926021bc8ed2e2487ca9e0837a3a5 SHA-1: 29f08e641facd36dff6ea6abd4fb4d561b10ef29 SHA-256: db544aab33e0c0bd40be335ab0eddfd1059eff8e2459dfd1d33e1f65a158f747
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and potentially distributing malicious content. The document body, though heavily obfuscated, suggests a lure related to a lecture summary. The presence of multiple external URLs, including those hosted on Weebly and other platforms, indicates an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://seumenha.ru/strik?utm_term=the+last+lecture+summary+chapter+1 PDF link annotation
    • https://zikazofikadit.weebly.com/uploads/1/3/0/7/130739129/mufeku_resupimakufos.pdfIn PDF document text
    • http://studytogether.fun/does_tens_unit_work_for_carpal_tunnel7mc9d.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/wixedalitodiwil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5fc95cf2be74d.pdfIn PDF document text
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/nekomofarafomajare.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/jjc4nUg/71081493867.pdfIn PDF document text
    • http://mirror-x.org/21820928146jaj59.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/befazuwififirokamu.pdfIn PDF document text
    • https://rujijixagav.weebly.com/uploads/1/3/1/3/131383475/0c62f0895.pdfIn PDF document text
    • https://tarofojazen.weebly.com/uploads/1/3/4/2/134235484/wiwiwopulixov_tafapetunobe_tekoxe_kobox.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/msjj9hc/music_video_maker_app_from_which_country.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_602c16c5287f9.pdfIn PDF document text
    • https://sorudexene.weebly.com/uploads/1/3/1/3/131384015/e722c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424026/normal_6032f9ce68e38.pdfIn PDF document text
    • https://mozufakumijisa.weebly.com/uploads/1/3/5/3/135333945/9543f52bed7.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/JiiHmid/74571870486.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/donarepemi/driver_asus_x441uv_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/28497385328.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/54863783274.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/ihss_san_francisco_online_timesheet.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_off0000fa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 4896 bytes
SHA-256: d38f6507eb350d618bdc46b8877d42589c3b60eac7bd62bbe25f39ee795e332c
font_01_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 9948 bytes
SHA-256: 8c8076dab2829d353e70871208c447266f528c160e2f706a302b000d5d243760
font_02_sfnt_off00012cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.