PDF malware analysis — malicious · caaab9c37c6cb2c5

MALICIOUS

PDF

76.7 KB Created: 2021-03-30 01:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 1e99c6d64647032e3450ab646b21251b SHA-1: e89adccbdafc9c2241763f227333d9cdc4c98b29 SHA-256: caaab9c37c6cb2c57d662f8b5beb6ac9e6435d1fd6da12a9cfb075e75d7e9867

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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://xezojetit.ru/wix?keyword=ninja+painter+unblocked PDF link annotation
- https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/wulebufag-vuwoxovikob-palaradeloxukix-kodowosezireg.pdfIn PDF document text
- http://ourfanz.com/basupuzekejeffk2nc.pdfIn PDF document text
- http://wozuxel.getenjoyment.net/galaxy_tab_4_sm-t230nu_update.pdfIn PDF document text
- https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/jezitariz_seluwamoxepuwa_vizuriresuwizi.pdfIn PDF document text
- http://wolifote.getenjoyment.net/refazovunopegatut.pdfIn PDF document text
- http://samo-katim.ru/vaxelimoligogilotusixot7umv.pdfIn PDF document text
- http://italiabeach.space/538426137815klos.pdfIn PDF document text
- https://lexolegav.weebly.com/uploads/1/3/5/3/135350326/6278502.pdfIn PDF document text
- http://regse.website/773048246965lhbd.pdfIn PDF document text
- https://lopatitegadusi.weebly.com/uploads/1/3/5/3/135311006/wegaluzarijakejijo.pdfIn PDF document text
- https://papobujiwirila.weebly.com/uploads/1/3/1/4/131453114/rutanalasibanarifof.pdfIn PDF document text
- http://wizapivizesib.mygamesonline.org/occupational_outlook_handbook_download.pdfIn PDF document text
- http://resapus.scienceontheweb.net/13276468763.pdfIn PDF document text
- http://dikegebe.mygamesonline.org/92270897120.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/cadf58f0-36c1-4ffa-9a07-a17a66d368d1/refif.pdfIn PDF document text
- http://wejufutaz.onlinewebshop.net/jefotedutuzepakav.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7c09ca5d-53fa-4632-9d19-316b5078b4d5/nufajepozutexumezovem.pdfIn PDF document text
- https://s3.amazonaws.com/fomudebipefasu/bukhari_shareef_in_urdu.pdfIn PDF document text
- http://jalijoruki.atwebpages.com/clinical_chemistry_text_book.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6d1458ba-374b-4b8c-ae7e-3a1343ea1614/fanefiwikufidomi.pdfIn PDF document text
- https://s3.amazonaws.com/kavugusepe/lotos_ltp8000_plasma_cutter_reviews.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/929a82cd-4573-4d7f-a51a-2776ae471064/what_does_ig_mean_in_texting.pdfIn PDF document text
- https://s3.amazonaws.com/nijosinizo/ecosystem_worksheets_3rd_grade.pdfIn PDF document text
- http://tizexazebubo.atwebpages.com/90636592998.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e1e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1E7	5020 bytes
SHA-256: `590f32dfbf107c2adc88cc4836e8c8aeb7fd38cf96d302b11e5c389ee2047ac2`
`font_01_sfnt_off0000f2f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2F6	10604 bytes
SHA-256: `a31bfbf39d21dda5a354db921a5f8d8c9fc8eeecb6ebc69e820f707969cd136f`
`font_02_sfnt_off00011724.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11724	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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