Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efa22392656bb66…

MALICIOUS

PDF

82.7 KB Created: 2020-11-19 02:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e9fb6a8715f0eb969a0e56f98b75d321 SHA-1: 02393a37f10bcba583d7092a43df44c58a20798c SHA-256: 0efa22392656bb66ba3dad5e6471c19e74e19370d96acc5c0e9f86a5ecb78c2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a phishing or malicious link farm campaign, as indicated by the "PDF_SEO_LINK_FARM" heuristic and the presence of numerous external URLs. The document body, though heavily obfuscated, contains text related to a "care plan," which is likely a lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://trafffi.ru/123?utm_term=chronic+confusion+care+plan PDF link annotation
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/7c3f1e2e5e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f9cc055ba7eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5fa37fdf37933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_5faf2d273a23d.pdfIn PDF document text
    • https://tulapubilogu.weebly.com/uploads/1/3/4/8/134881906/8737f83aae.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/lixuduwonifa/bouncy_basketball_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/bella_cucina_circus_waffle_maker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c90638b-d83e-4899-93ef-43303271e67c/ac_circuits_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa78a00-87fa-4409-a238-f308b364fdda/gurifemigovadebunibarowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8afce139-3aa6-4b8d-9f97-5eeff61fc845/epic_war_6_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5869cca1-ef33-474a-aa34-2fb22ff5cb8b/free_download_for_laptop_vidmate_install_app.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/komurenawobotonozatozi.pdfIn PDF document text
    • https://s3.amazonaws.com/tibovubowilex/twilight_forest_wikia.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/vuwupupezejagijesabik.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B0 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000cff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF3 5008 bytes
SHA-256: 80e42c26163384f150f834f61d28f31929757607754ab1fa004cda2fb624b640
font_02_sfnt_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 11736 bytes
SHA-256: d9d233eec262c2a2e7a5cf723bd61fc22e7a619e1d82251696037f2bf9ee3a79
font_03_sfnt_off000101fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FE 10560 bytes
SHA-256: cc4fe949718ff33aeb3d695b47b276b47b5d7f17d1322fdc7962284da1ffd656
font_04_sfnt_off00012633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12633 16216 bytes
SHA-256: 9aaf374d64521945a2d179b3de22a0ad451813c1e8d23897d9514ef9876b453b

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