Malicious PDF — malware analysis report

Static analysis result for SHA-256 431370c84e876b49…

MALICIOUS

PDF

91.0 KB Created: 2021-03-10 02:50:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: edb2c5e1920c32a5cd33598be92deb4e SHA-1: 9968084826dfba50382ffa032b2524e91da6ff47 SHA-256: 431370c84e876b497d84293e935730ea07104babb94ab7936302756fa5f85471
184 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=powermate+generator+5500+reviews'. This indicates the document's primary purpose is to lure users to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to exploit users through deceptive links, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=powermate+generator+5500+reviews In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481699/normal_6008ffb1be5de.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/tap_dancing_to_work_bill_gates.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fcd3429176d5.pdfIn PDF document text
    • http://enots.space/53211761622uyfcf.pdfIn PDF document text
    • http://golepikoxeware.22web.org/sojozimot.pdfIn PDF document text
    • http://kernig.store/kipexorutalosisunemesivapcj.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/epidural_anesthesia_complications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_601f0f995990a.pdfIn PDF document text
    • http://niwifara.22web.org/pasozezoxulupepekodu.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/51979754849.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/recurrent_aphthous_stomatitis_journal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/37121066271.pdfIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_aaf063cf2f874bd1a9e9a0ed0cdf777e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/caa_member_number_format.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_21fe30ff455341e98e95595e1355534a.pdf?index=trueIn PDF document text
    • http://bubotelerokuz.rf.gd/26521553649.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_522e79112c93424194795e0a3d37c716.pdf?index=trueIn PDF document text
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_2b5d70f65df74b42bc4caf716b54179d.pdf?index=trueIn PDF document text
    • http://welididoseburiv.epizy.com/zebosoxewugujevux.pdfIn PDF document text
    • http://miredibe.rf.gd/44436513831.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/wasivaru.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_0d293a76310c47b3b66373299c660f30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/activator_windows_7_professional_64_bit.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
    • http://www.gnu.org/licenses/gpl.htmlIn 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
font_00_sfnt_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 5392 bytes
SHA-256: 58e5f494996fc845a6374b472b83ea532f8e25da1e39c8e71944bfd46f84050f
font_01_sfnt_off00010b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B18 8148 bytes
SHA-256: 676f7a0b9ca0c3e9a695fe321604b5e5b95023c579e779ce7f1fe6e98fa6f1a5
font_02_sfnt_off000121b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B9 11316 bytes
SHA-256: 38522a189e2891dd363f7d6c6573853ef2391aaa3bfb2e438d4f21c7450b1df0
font_03_sfnt_off0001487d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487D 16172 bytes
SHA-256: fc3f618fe247a2d43deeaa8b38a1cef08f0d945faaf33df5eb97992fdd579049

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