Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd599094a5b0cd40…

MALICIOUS

PDF

71.1 KB Created: 2021-03-21 22:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4a82d28a07cab95bf5c2450fb9743334 SHA-1: c899cd3824463265f0e4d6c4016bc35504731f7a SHA-256: dd599094a5b0cd40ffed105c21acbdb4e42f4cf1a4a9bc2293cada22bb84594d
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect users to potentially malicious content or phishing sites.

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
  • 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://soxebez.ru/wix?keyword=incredibles+2+full+movie+in+english+youtube PDF link annotation
    • http://nuveclovet.xyz/the_divine_mercy_chaplet_audiog6xe6.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/4EBjeys/calculator_soup_scientific_notation.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/lasogegutiwu1zs8.pdfIn PDF document text
    • https://dozumudokasalog.weebly.com/uploads/1/3/4/9/134902229/5cdbffa6.pdfIn PDF document text
    • http://voirlo.xyz/how_to_use_pals_rewards_onlinesq1s2.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/XageCjc/random_fill_color_illustrator.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/Vziajhr/i_ll_be_seeing_you_sheet_music.pdfIn PDF document text
    • https://luxakanodaz.weebly.com/uploads/1/3/4/5/134589800/2456719.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/fqhfijh/74158638839.pdfIn PDF document text
    • http://reduslim-officialsite.site/49626798584beeyp.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/fararomijadob-betepibo.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/da63c8618.pdfIn PDF document text
    • http://legiontry.online/christopher_hitchens_kissinger_youtubeksdak.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/jevelel/73559526856.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/jikuvirurefurepuzum.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/gigejoxoterutezavinavo.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/wewatazenibiraseseke.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/how_to_reset_honda_accord_maintenance_required_light.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/76175342740.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/types_of_dramatic_plot.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/baghban_songs_mp4.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_off0000d778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD778 5596 bytes
SHA-256: 9b04cb7c4adb6faf2984130d8511ae0e865ad3bb25ec3339ea9c9c7573d3982b
font_01_sfnt_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 10880 bytes
SHA-256: e3cf0c8b333f4b5d558d1489e919ca278c4dc0a5157e99be6508aa027d07dd61

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