Malicious PDF — malware analysis report

Static analysis result for SHA-256 443dae930b5f29b8…

MALICIOUS

PDF

89.9 KB Created: 2021-03-07 23:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ba28ccd0eb340bb4dc0fbd04f28209c SHA-1: 974594045ef3e7eb53cf8deb3fa07de0869eee62 SHA-256: 443dae930b5f29b8fb4863a7ff5a940d94890a02d4550a71e508856cade658b1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a security-bypass lure. 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 0.9977

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://xezojetit.ru/wix?keyword=yoink+executor+roblox+download PDF link annotation
    • https://saxavotu.weebly.com/uploads/1/3/5/3/135306365/zupijedex.pdfIn PDF document text
    • https://dedopaka.weebly.com/uploads/1/3/4/4/134498192/6740515.pdfIn PDF document text
    • https://wenezobu.weebly.com/uploads/1/3/4/6/134625155/muxakorugin.pdfIn PDF document text
    • http://vovality.club/1996_7.3_powerstroke_repair_manualcdin4.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/god_can_do_anything_but_fail_chords.pdfIn PDF document text
    • http://braco.ru/658594221075xk4b.pdfIn PDF document text
    • http://bluebadge-support.com/btd4_hacked_versionuwn78.pdfIn PDF document text
    • http://presentinsta.online/tascam_portastudio_424_mkiii_forumsq9onv.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/what_is_the_difference_between_dewalt_and_dewalt_xr.pdfIn PDF document text
    • http://sovetnik53.ru/ortografia_y_redaccion_para_secretariaskofa3.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/ratadukekivol_raduger.pdfIn PDF document text
    • https://kusebavizekofuk.weebly.com/uploads/1/3/4/0/134098677/lilawironidezil.pdfIn PDF document text
    • http://zaximudetebase.iblogger.org/14911833050.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/28681653986.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/zakunafu/99308097577.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/antivirus_samsung_android.pdfIn PDF document text
    • http://gafodix.myartsonline.com/rudawubaf.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/78477247004.pdfIn PDF document text
    • http://falufobi.epizy.com/niwupetivodofuwejixe.pdfIn PDF document text
    • http://jaxarafepemu.epizy.com/hungry_shark_evolution_cheats_mod_apk.pdfIn PDF document text
    • http://pifazudiso.rf.gd/letter_sound_recognition_worksheets_kindergarten.pdfIn PDF document text
    • http://daduzafez.epizy.com/wofewuvuvumavopoleg.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/blank_newspaper_article_template.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
    • 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 5080 bytes
SHA-256: 7b983f5f1c834e01cd99ef7075a447b4a380ed72f5418f006e6d7b8ae39ae50f
font_02_sfnt_off000113c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C8 2540 bytes
SHA-256: 0bcffb07939ebb353c7d16d906e623f41b1277fdd5246d723e63c94ea42fa4f9
font_03_sfnt_off00011eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEC 10448 bytes
SHA-256: a7f4a7fcc523503613136b741dc98aafb84b13a5d87200af444bd7f9a5596380
font_04_sfnt_off000142f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F6 16336 bytes
SHA-256: b7ec44cfe2208ace95a2ce43e698390e22c67aa42018be4a86f0f90cbe714ace

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