Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11e87e34708294f…

MALICIOUS

PDF

101.6 KB Created: 2021-03-08 16:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ca98e81d91596188d95c85d61f3f6bc SHA-1: 5f59b8a23bff398dfa9617ae7ed29d0d9b828677 SHA-256: b11e87e34708294fff216e9f980b5d479d9b47a8cd7c92e755b2deb683248e63
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 0.9991

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://baarspo.ru/strik?utm_term=managerial+accounting+11th+edition+chapter+4+solutions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410418/normal_5fc70d1880be7.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/ehj6wxF/highway_to_hell_chords_ukulele.pdfIn PDF document text
    • http://cozyplacefor.rest/gumagujvbv6x.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/86388484503r8jii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_604064e51b7ec.pdfIn PDF document text
    • http://aycotoro7.xyz/81155194118ocbac.pdfIn PDF document text
    • http://5coupons.info/evangelio_apocrifo_de_tomass64ud.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/GxggXIk/live_nba_live_stream_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/lZ7jhjf/22711946961.pdfIn PDF document text
    • http://vatitafi.22web.org/61558552398.pdfIn PDF document text
    • http://vas-rem.ru/ridgid_air_compressor_manualqefel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fe64a8776505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5fd78f397abe2.pdfIn PDF document text
    • http://bokukot.22web.org/bottomsheetbehavior_illegal_state_argument_5.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/ijHdBhe/51356870961.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bamasivira.rf.gd/feforowovusupenemalo.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/39319729150.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/whatsapp_video_sad_male.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/satatopofibesutezigu.pdfIn PDF document text
    • http://nabarosurugi.epizy.com/black_panther_wakanda_font.pdfIn PDF document text
    • http://jarenusu.rf.gd/first_things_first_book_summary.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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001126e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1126E 14656 bytes
SHA-256: f179a8c6315b1a9de70bc2cd67b06c29526b101abfdd8f7ca2b8b85c333e26de
font_00_sfnt_off0000ffc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 5480 bytes
SHA-256: f9a3c22ab78e29c646ddfa1297d714c280c88e1a023d9604d1f0cf9229f8f5b9
font_02_sfnt_off00013979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13979 11920 bytes
SHA-256: d52fb6087c0222197e21003bb88bda03b1229bfc9e673c0e849835d710835bad
font_03_sfnt_off000161fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161FD 21200 bytes
SHA-256: c1056ac8f71aeffeaccc6bfc81b837b837f11b12d5c46b6e805106933d7a7109

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