Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc03f600926ae658…

MALICIOUS

PDF

97.3 KB Created: 2021-02-22 16:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3e39ba8ad093c245511cf11d15e73535 SHA-1: e2735c31a3d153717bec5cace3cb52679756b6a4 SHA-256: dc03f600926ae658448f1827cf626a7aec02f1e2ccfbe2cedf0345759acdf6ed
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/123?utm_term=journey+to+the+west+2+full+movie+in+hindi+hd PDF link annotation
    • https://betataniboluwi.weebly.com/uploads/1/3/0/9/130969090/2179329.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/bazegaxozunilatisiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/hijcMaZ/how_to_learn_cnc_turning_program.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/baveboremigunu_sanesoruneg_lavusulizulen_judemimopuxex.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/aVigEJh/zombie_combat_simulator_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/ggELLuO/best_switch_indie_games_2017.pdfIn PDF document text
    • https://xodozevonewoze.weebly.com/uploads/1/3/1/3/131384462/9bbff28b6c0eb.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/ghgjij2/fangamer_stardew_valley.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/iiDjcgi/93585055360.pdfIn PDF document text
    • https://potezevaledu.weebly.com/uploads/1/3/1/4/131406960/biruxige.pdfIn PDF document text
    • https://cdn.sqhk.co/dukapudubi/jeTAZij/looper_2_full_movie.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/add0d4662a67e.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/fatupobixuwebo.pdfIn PDF document text
    • https://zesajuletolif.weebly.com/uploads/1/3/0/9/130969916/836791b9f1541.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/juzom-mifasiwi-jopobubevadega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 5196 bytes
SHA-256: 922e9c5ec5d1962e0670270bb21d2b2c8071c181d3d1bc6b997ee67826feb496
font_02_sfnt_off000113be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BE 1704 bytes
SHA-256: 172930bac85bd3bd98a30b6a3451fa7d886b4850dc15fb1c8e56fbc00c23d766
font_03_sfnt_off00011c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C40 11148 bytes
SHA-256: 377e39eb5df51374bcfccaa34a6cb055c275fe4dda15731a98d0b45356ac7b71
font_04_sfnt_off00014282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14282 16096 bytes
SHA-256: 956035ab2107023ed64e46e4addcb2798c36699bb98f1262240ce67edfac670b
font_05_sfnt_off00015742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15742 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_06_sfnt_off00016504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16504 6068 bytes
SHA-256: 9ee40c72548f11b0f38f8baffca441a734123f1dcc0a203021cd8cd9097e69ef

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