Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e18972c20ab173…

MALICIOUS

PDF

84.1 KB Created: 2021-03-25 09:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e7312b9972c4287fd1a7283308d7ad4 SHA-1: 3a06c3e56916b4a407789a1a1a1f310f889202c2 SHA-256: 15e18972c20ab1730cea7804fbf710058f9a59509aea94089622c0c1b526f905
186 Risk Score

Malware Insights

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

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 0.9995

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://dafemum.ru/strik?utm_term=after+we+collided+2+release+date+uk+netflix PDF link annotation
    • http://kewatupu.scienceontheweb.net/37516142833.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/hampton_bay_ceiling_fan_remote_with_dimmer.pdfIn PDF document text
    • https://logugutixolug.weebly.com/uploads/1/3/5/3/135393325/b14aa4f7d.pdfIn PDF document text
    • https://bulabameworiw.weebly.com/uploads/1/3/4/0/134096114/95e542.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/rekogi_pimav_gojewew_tefapogore.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/U1Qpiij/night_on_earth_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/igghaic/national_test_abhyas_sign_in.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/7402766474.pdfIn PDF document text
    • https://wujadadi.weebly.com/uploads/1/3/1/0/131070572/fowojuja.pdfIn PDF document text
    • https://cdn.sqhk.co/tojuxuzumar/Rhfhdoj/run_android_apps_on_windows_8_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/kinuneba/hage3Fo/cfo_jobs_utah.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/gfjbbha/18909970157.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/hjeiaC1/easy_homemade_cake_recipes.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/epidemiologia_diabetes_mexico_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_4221fb4c0b1d4f209b23ed19e8dba734.pdf?index=trueIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_e0210f2197bd4518b09e4f3ce3c5a124.pdf?index=trueIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_51a59433a04949d3a0e42b7bd2b28374.pdf?index=trueIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_45f23ce71b334d918f9c68d42b8932c7.pdf?index=trueIn PDF document text
    • http://ximuxulizi.myartsonline.com/rolasox.pdfIn PDF document text
    • http://nomamazuzut.atwebpages.com/23655890131.pdfIn PDF document text
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_6b8ba21add8d4bd6a21178781667355e.pdf?index=trueIn PDF document text
    • http://sutexuvidag.myartsonline.com/mustang_2070_skid_steer_parts_manual.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 5360 bytes
SHA-256: 2e3fb6570e5e60b6439cbd39f87d8962e09d2bcbe752b39b5c93ed72b0aec6c1
font_01_sfnt_off000105a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A3 11544 bytes
SHA-256: af1363597fa01c1791d415d5e2815b8ce8ebbfb3d84e1ffa2ee4f939e017ce3b
font_02_sfnt_off00012d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4F 16168 bytes
SHA-256: bcfecb9fde4b74e4a2b692e15caf305b2988a1cfe4c6386614002e38d35feb86