Malicious PDF — malware analysis report

Static analysis result for SHA-256 189977926274126e…

MALICIOUS

PDF

71.8 KB Created: 2021-02-21 14:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a841f468dca77972ba2d92ac5b848a62 SHA-1: f0ce7bb94bce65c592e2bb2fe986161ba6cea52f SHA-256: 189977926274126ecc96f9c725e59667ff012e6c8f51563f959cea6e062ea64e
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or domains associated with link farms, indicating a likely attempt to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to exploit users by presenting deceptive content, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/123?utm_term=lg+refrigerator+model+lfx31925st+air+filter PDF link annotation
    • https://cdn.sqhk.co/mekizojo/jbihChh/6315649470.pdfIn PDF document text
    • http://dihtyar.online/does_the_rainbow_air_purifier_work8erlq.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/QyqDgg6/skipping_rope_weight_loss_challenge.pdfIn PDF document text
    • https://wuxagukokixeg.weebly.com/uploads/1/3/5/3/135398542/4305384.pdfIn PDF document text
    • http://ukranews.icu/vigetipodudulujesivetith7p9n.pdfIn PDF document text
    • http://chategratis.online/388520091511tcom.pdfIn PDF document text
    • http://shimano-stradic.ru/m3u_live_tv_playlistorp4n.pdfIn PDF document text
    • http://hookup673.site/30_under_30_awards_lawyers_weeklyn3esm.pdfIn PDF document text
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/2fdf4f.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/iifvhb3/63772648743.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/74870a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478127/normal_601b6f3fc8807.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/ja2gjhg/tejaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabowifomewod.epizy.com/89682319406.pdfIn PDF document text
    • http://karapazixegipi.epizy.com/bumper_offer_naa_songs.pdfIn PDF document text
    • http://detuzepa.rf.gd/37261900172.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/s_name_wale_whatsapp_status_video.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_off0000d970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD970 5864 bytes
SHA-256: 57b233a81edebd83ad027b1e4f8ffe0e6d31207ff13ba42d62bb8a149a83b4a4
font_01_sfnt_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 10588 bytes
SHA-256: 326bcc66753dd7a9973bfdc1a1f044643f3f53db6473c6a6d0cdec82ab236175

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