Malicious PDF — malware analysis report

Static analysis result for SHA-256 926d0ee95dd7dd5f…

MALICIOUS

PDF

76.9 KB Created: 2021-03-04 00:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: e3f3a294308a7b1e3d622dfa2f4ef0d6 SHA-1: 4123ef8cffd263b6f2aeac850533d614096a2e69 SHA-256: 926d0ee95dd7dd5f38ff10d52427e894744537f0912008703923381d1945cc26
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a link farm designed to trick users into downloading further malicious content, as evidenced by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'SE_DOWNLOAD_BUTTON' firings. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs point to disposable domains, further supporting the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/123?utm_term=how+to+set+time+on+lacrosse+radio+controlled+clock PDF link annotation
    • http://salonop.xyz/casio_fx-_991ex_user_manualpmiwm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379602/normal_5fecf70224302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fd69ebd3347d.pdfIn PDF document text
    • http://ogranicbio.fun/how_to_get_meat_in_conan_exileskc3l0.pdfIn PDF document text
    • http://wow50.pro/aia_full_form_in_bsfhv677.pdfIn PDF document text
    • http://wide-do.top/xonobetusajiromxracp.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/duvode.pdfIn PDF document text
    • http://italywow.space/19126913461du81y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fcb2b3ca804b.pdfIn PDF document text
    • http://sberpodarok2020.online/81316975503ps4f4.pdfIn PDF document text
    • http://3-bureaureport.info/38748707323p1gt9.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/zulezov/naach_meri_bulbul_song_hey_bro.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/baasha_2017_digital_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/creative_writing_assignments_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/new_ugandan_songs_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/batifulizave.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_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 5200 bytes
SHA-256: 301bea3e0b53d0c3487453ff670ce788b2e697128f69179d8fd8f2b00d373014
font_01_sfnt_off00010396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10396 10156 bytes
SHA-256: 78c7ae960669900ac4b6ab0618919ef7d28ee16e647224d4ca8efea59b929ae4

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