Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e12de896d858b95…

MALICIOUS

PDF

106.2 KB Created: 2021-03-29 12:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 729fc86a818975e9f174ce718f8c8ae6 SHA-1: 16744b4760c81917315afdaf52f1aa143f7986c7 SHA-256: 1e12de896d858b955f8096d0654cd54e4f409d9a4c7c9b35941f2b0f96c8406a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run 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 0.9904

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://botokaw.ru/123?utm_term=bedsheet+painting+kaise+kare PDF link annotation
    • http://lavkavkusa.store/91481945217ba6c8.pdfIn PDF document text
    • http://keysecret.ru/tukiganusepodip9hv2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464072/normal_6050daeae3951.pdfIn PDF document text
    • http://kinorio5.xyz/speaker_test_code_for_androididdun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_6039540a5af97.pdfIn PDF document text
    • https://bidilupaduwin.weebly.com/uploads/1/3/4/4/134464246/8990ee8aeb146e.pdfIn PDF document text
    • https://tunorikiwevog.weebly.com/uploads/1/3/4/0/134097136/samojagivineza-kuzinufokozuwe-vetij-ledal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_604d90282e0a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428335/normal_604ae15c028ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415526/normal_5fec3ef9d8ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_60334e73c5aba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_602f8d8678bae.pdfIn PDF document text
    • https://vosanabawikek.weebly.com/uploads/1/3/4/0/134000461/barofusiwezifas-bamidi-labonewe.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/degavutam.pdfIn PDF document text
    • https://dexajaxalujum.weebly.com/uploads/1/3/1/8/131857565/romimukebiwe_nakubu.pdfIn PDF document text
    • http://usejus.pro/xufobumilavobululus6x.pdfIn 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://uploads.strikinglycdn.com/files/8e72b648-4e8c-4f53-902b-7c34a381ae50/what_is_the_definition_of_zen.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/20929661192.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/decathlon_india_sales_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263a358e-8755-45db-8eb8-7aa1ca8a3e04/44982246052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be16e7d-8698-4e47-9cb8-55ccfb77db1d/10146219971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad610dc-d3d8-42b9-9b01-052d194c77df/357594180.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/44960732477.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/61147465038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c625dd-06a7-470f-ad8c-b10655dd91b5/78008724517.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/66938588097.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.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACD 5304 bytes
SHA-256: ce55f082f177f26ecbe85dcd171682040a92c033466a48921597159707034884
font_01_sfnt_off00013ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCC 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0001482e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1482E 10776 bytes
SHA-256: 979badae26a0c8ec14edac609cb9025ca0e56d6a3cdf66e30cdfaab3cdd04819
font_03_sfnt_off00016d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D1D 14700 bytes
SHA-256: 682b30c2586525c9697f9f7c12480d8369e147a06f7debe8fc38014425fa5516