Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6296e02554965a7…

MALICIOUS

PDF

72.3 KB Created: 2021-03-16 18:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6e6c657617b77c228acb001055f30232 SHA-1: 7baa7e234667e2184942554e59b639036028d074 SHA-256: a6296e02554965a760d1164a861d1f87dff16ac91899c3fb6587e59005d5c7bb
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains commonly associated with SEO link farms and potentially malicious content. The heuristic PDF_SEO_LINK_FARM specifically indicates a mass of external links, suggesting an attempt to drive traffic or distribute malware. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=isettings+apk+free+download PDF link annotation
    • https://cdn.sqhk.co/viwedanej/b4EH1gf/75105488267.pdfIn PDF document text
    • https://cdn.sqhk.co/rogevuzazi/gfgcidR/23408545041.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/Ohhnjck/dragon_quest_11_walkthrough_part_2.pdfIn PDF document text
    • https://fitatopiwize.weebly.com/uploads/1/3/0/7/130739398/7762c4.pdfIn PDF document text
    • https://zofafekolabu.weebly.com/uploads/1/3/5/3/135301669/remewa.pdfIn PDF document text
    • https://cdn.sqhk.co/zipedufipiz/9hepagi/54535403121.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/ejbQpOl/6597655387.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/cute_dresses_for_first_day_of_school.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/7gcsNhj/39151047031.pdfIn PDF document text
    • https://cdn.sqhk.co/tireronerogo/Vybz2hh/london_bridge_hd_wallpaper_for_laptop.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/tesodagiwor/23056422632.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/68975238598.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/cablevision_flow_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/ronibokatotemizivot.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/79024174086.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/agusta_case_chargesheet.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/los_5_lenguajes_del_amor_test_para_esposas.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/55002197034.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/david_guetta_titanium_piano_sheet_music.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85B 5304 bytes
SHA-256: e65b48dd71a00ed74060b305d7ab6a4f315865cc4f4a7e3295b76eb0be75bad0
font_01_sfnt_off0000da8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8F 10428 bytes
SHA-256: 52e6c74dd9034d77eacb072ae381249e92eec685b1407ea4c665276105d842b7
font_02_sfnt_off0000fe6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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