Malicious PDF — malware analysis report

Static analysis result for SHA-256 946b1fdd9288a8b9…

MALICIOUS

PDF

109.6 KB Created: 2021-04-18 09:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4185726cdbd053932ebbf695854ee6af SHA-1: 0c28909b977e25339dd7faede02e45df2aedaf30 SHA-256: 946b1fdd9288a8b9ed558297155627b8d9485a9914143b9ad2a0e0afaf0e6ee6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=propresenter+5+moving+backgrounds+free PDF link annotation
    • http://metikinave.22web.org/nevajepeluzesik.pdfIn PDF document text
    • http://vinnipoh.fun/funny_videos_try_not_to_laugh_impossiblej8xy2.pdfIn PDF document text
    • http://pusokum.66ghz.com/zesetodisukipemisivemesas.pdfIn PDF document text
    • http://bit7.top/91643832937y2ah8.pdfIn PDF document text
    • http://remontlegko.info/rca_usb_charging_clock_radio_instructions1bmsh.pdfIn PDF document text
    • http://reduslim-shopofficial.site/394135380146n79m.pdfIn PDF document text
    • http://uscreditinquiry.info/tuwewediwujuruliwerojinawdgn7.pdfIn PDF document text
    • http://testersairf.xyz/buvusisuwamn6233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9a86171b-24d8-4f43-8717-687e75280c8f.filesusr.com/ugd/6234e8_93049836643e44a3845394da8f707ea4.pdf?index=trueIn PDF document text
    • http://xinasewaja.epizy.com/bigusuw.pdfIn PDF document text
    • http://febaxur.epizy.com/what_does_kbp_foods_stand_for.pdfIn PDF document text
    • http://pidejekakej.epizy.com/centroids_integral_calculus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee465699-3693-4367-afee-355b8a4bd378/golds_gym_xrs_20_weight_bench_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defd1fd6-f9cb-460c-80f1-aaeb77d1a1a1/1007022879.pdfIn PDF document text
    • http://pikusotanuw.rf.gd/84701740234.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_3ffb80cdf8a24288ba815707edd5d46a.pdf?index=trueIn PDF document text
    • http://xovefepotulat.epizy.com/82014814355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39802820-0c9a-430b-a773-41483719e100/50689745209.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_6c190c20b02d47ee961c48977e0e87b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53a9d4c-73aa-4410-afcc-87736928318f/belar.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_a606a8f2c9814c50b1db5c1fa46e6f14.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001688d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1688D 5832 bytes
SHA-256: 002f9ae4aa261c0b598e418c14056ae399cdbdb18ad15fbf7af389920add0a73
font_01_sfnt_off00017c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C62 12368 bytes
SHA-256: 6a13f5b1889a33f9791659b635af57df430335e789ea32c37c4ea9fba4ed6d47

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