Malicious PDF — malware analysis report

Static analysis result for SHA-256 456cbc927f39978d…

MALICIOUS

PDF

76.4 KB Created: 2021-04-04 09:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05b2446f78f451846be8b7a91c2637b9 SHA-1: b1acc63d5fb2f941a0d84832ce2969ba495000c0 SHA-256: 456cbc927f39978d3adbb23a36d7ec4bae4058d20abd3ddb0aa80ed617971248
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://gimoguvi.ru/123?utm_term=demon+ps2+emulator+games PDF link annotation
    • http://gojifoxedot.iblogger.org/hunter_s_thompson_hell_s_angels.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/DEkigha/55607588009.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/iIhbvid/80860454078.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/cDDDYgh/latine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_e000f431e591496f831393766a7a7502.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/joxoriwefiro.pdfIn PDF document text
    • http://duximepameme.epizy.com/xadufodupanojalulomari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd972e73-2512-49de-b37d-672b1e3d068b/how_to_play_roblox_with_bluetooth_keyboard.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_9311decf1e70472381b786cf31d3219a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ca0168-9f19-4105-ac15-6a77e63ba449/74329657245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003ad76a-c863-428b-a70e-23dd25722730/52054589240.pdfIn PDF document text
    • http://robopawize.epizy.com/fender_mustang_3_v2_100_watt.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/cartoon_type_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/breaking_the_chain_of_infection_worksheet.pdfIn PDF document text
    • http://wekijedi.epizy.com/court_of_asphodels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60dc312-33ee-451c-906b-483069cead5b/85396125726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b88af6f-b966-4ff7-adf4-7121fbdce236/how_do_i_contact_buffalo_wild_wings_corporate.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/graphing_calculator_software_for_pc_free.pdfIn PDF document text
    • http://zowonotetejubi.rf.gd/letuvoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc535861-2540-406b-aad1-ad1026e5cdce/85922200614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82180dd6-3091-4031-9396-df8f479f5561/lexmark_prospect_pro205_reset_ink_levels.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 5272 bytes
SHA-256: 4019cb3ffe5acd993327106a48ca5c5f1ecf031589d9443c51f207199d4494e0
font_01_sfnt_off0000ffbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBC 10752 bytes
SHA-256: 00aadd9dfd489d8abffa1108be979c5e5d887258c13f59880a0fe0d80e789f6c

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