Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e84fa5c14c8b48b…

MALICIOUS

PDF

97.2 KB Created: 2021-04-22 13:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 39b2f5be2561cc53afe41b4f9445d861 SHA-1: 9df21ce280d867b1ca026cf739ae51808b6abda2 SHA-256: 0e84fa5c14c8b48b8f97bf98c371de786aa0af475084b24416e9234ba790c29d
126 Risk Score

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 0.9990

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://maypoin.ru/strik?utm_term=the+crucible+character+analysis+chart+act+1 PDF link annotation
    • http://kejitarumemoj.iblogger.org/24159299393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414514/normal_603e88e0beab1.pdfIn PDF document text
    • http://roxixil.iblogger.org/total_gym_assembly_instructions_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_603a0e8b0b4db.pdfIn PDF document text
    • http://mukuwasoveta.sportsontheweb.net/ubqari_magazine_may_2020_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_606b54892bd17.pdfIn PDF document text
    • http://witotikumuw.22web.org/how_to_mortgage_property_in_monopoly_plus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_6010a47967885.pdfIn PDF document text
    • http://xavolavuduxi.22web.org/jigegizutozadatomuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_605888b266118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_60280f00056f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449775/normal_5fc8bcc4ab2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5fda547570e9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477373/normal_5ff104d09246d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuginifetulad.epizy.com/joy_in_learning_english_textbook_grade_5.pdfIn PDF document text
    • http://lopafulobitap.atwebpages.com/plasticity_and_modern_metal_forming_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/57219391226.pdfIn PDF document text
    • http://lawurukipajuxe.rf.gd/cyber_hunter_lite_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/81354079086.pdfIn PDF document text
    • http://kusokexefutaj.epizy.com/soal_bilangan_kuantum.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/futevozekeze.pdfIn PDF document text
    • http://vatamutotomo.epizy.com/gta_3_cheat_codes_free.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001174a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174A 6588 bytes
SHA-256: fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a
font_01_sfnt_off000127c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C4 5128 bytes
SHA-256: 1186ef59fc0ae2004d1eee8a71232a7496d6f7853b9c49f372e92d5e5e2e1718
font_02_sfnt_off00013937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13937 11956 bytes
SHA-256: c035f8fae387a99e4befb44a65abadb2c7ffb5a7944b322397c719da4277b804
font_03_sfnt_off00016175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16175 16116 bytes
SHA-256: 5ec139a263af45d7cbac1bc1a000173eb4e7f97797aba0f35ce2e37505b4886e