Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c073b1d1700ec16…

MALICIOUS

PDF

131.9 KB Created: 2021-04-02 00:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 01b05123bea0c4c3fcf76667c7473e1e SHA-1: 7c962d4e12252a134aea00153874a4d9207e3881 SHA-256: 0c073b1d1700ec16db99ac287a9a3d2dd7b196c5a69b5878e2d24629ef27f068
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm for SEO manipulation. The primary URL, 'https://nipisod.ru/strik?utm_term=bible+handbook+app', suggests a lure to a potentially malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • 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.
  • 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://nipisod.ru/strik?utm_term=bible+handbook+app PDF link annotation
    • https://cdn.sqhk.co/wisisatofife/wjjifhj/free_1st_grade_reading_comprehension_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/ge9l7CQ/how_to_play_dog_simulator_roblox.pdfIn PDF document text
    • https://cdn.sqhk.co/raxasumo/Qjar8jc/oxygen_os_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/faserekino/asighhq/east_coast_radio_top_40_playlist.pdfIn PDF document text
    • http://vejawezodasupax.22web.org/51700360609.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/64848631426.pdfIn PDF document text
    • https://cdn.sqhk.co/kukabelek/jVAsU21/70853088516.pdfIn PDF document text
    • http://nafigunagofadab.getenjoyment.net/capital_requirements_regulation_deutsch.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/datujifibonexijalal.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://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/interrogative_pronouns_worksheet_for_grade_1.pdfIn PDF document text
    • http://famegazaven.epizy.com/deeplearningbook_github.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_aa97c5e6c93941289eb92488e5ae0d67.pdf?index=trueIn PDF document text
    • http://junikul.epizy.com/antibioticos_utilizados_en_odontologia.pdfIn PDF document text
    • http://gagolabirej.atwebpages.com/22704703732.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/insect_science_author_guidelines.pdfIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_f8c487e5afe24d7f81bd3c18e509e01f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wunojipu/pugilelakatoxazupogak.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/ielts_listening_13_test_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/16233584750.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_725ed431550c4b66b46abe2b068e8308.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/15042291216.pdfIn PDF document text
    • http://nevafofuvabovid.atwebpages.com/hollywood_actress_name_list.pdfIn PDF document text
    • http://guxudapese.epizy.com/cnidarians_simple_animals_with_a_sting_answers.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016aaa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16AAA 10708 bytes
SHA-256: 8669a4b23b92520e0d5e32e9a98a14f6d7899866ea30ef1a974cc293e7dffff9
font_00_sfnt_off000138f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F8 9748 bytes
SHA-256: 55b292ee95fdecf96475bb82f50e4774085da9cd8688c0e8b703bb739a58ce13
font_01_sfnt_off000159a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159A5 5024 bytes
SHA-256: 2f8445ee8f27624a45e60d01454c3959c6a1c3a236917110ebe96af95f87dcbb
font_03_sfnt_off000188e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188E4 20668 bytes
SHA-256: 64d756961f43fac5c1b94fd45d04fb80215288226fd60d14f20e6a913ff342a0
font_04_sfnt_off0001c581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C581 23000 bytes
SHA-256: bbb7698f683409fd95f184ab261f27d483a12de216f95f398ba672f60e6a4427
font_05_sfnt_off0001edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDF5 4760 bytes
SHA-256: 9cb7648fd86f533186e5b23132ee5398df559384b75ecec66ab1bbb32da8ad1c

Open this report in the interactive analyzer, or submit your own file for analysis.