Malicious PDF — malware analysis report

Static analysis result for SHA-256 e753522696ab16ad…

MALICIOUS

PDF

78.4 KB Created: 2021-05-29 18:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b3726c921fa65275269a8b1f9b8c71cc SHA-1: 96758070f664ba679d84a1bfe8f7a3fab0cd17e6 SHA-256: e753522696ab16adb1ecfec7b518127c6b521784bf54dc36e130c79e22fa92b6
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a phishing or malicious redirection scheme. The presence of a download button lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to trick users into downloading potentially harmful content. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/strik?utm_term=download+betternet+vpn+premium+crack PDF link annotation
    • https://wijugiretatito.weebly.com/uploads/1/3/2/8/132814958/6536720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fd67dc721c41.pdfIn PDF document text
    • https://tojoxiwumo.weebly.com/uploads/1/3/4/3/134319360/5014448.pdfIn PDF document text
    • https://nizegefubazada.weebly.com/uploads/1/3/4/8/134872151/tenosavagonidu_lenudepoxegate_basiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_604300146d1e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_602a116fd4885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454182/normal_605a5b7521ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_602aa5442e019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491450/normal_5fe1bf3bb86c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448719/normal_606c0a43a90b3.pdfIn PDF document text
    • https://vofixerexelisat.weebly.com/uploads/1/3/4/3/134311693/9781621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_6054bc4678c74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b5298b-b3de-42d3-9c42-bf521c723ba7/creative_project_manager_jobs_chicago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d6cee6-080b-4bec-9cdf-443e20d9373c/43999253215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bdca151-76a1-491f-9ce6-52e08184f475/augustine_confessions_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051fa213-41be-42e7-9b54-72c116cd6739/ccna_security_salary_in_mumbai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2145f6a4-495a-413f-93e2-871970317308/holmes_air_purifier_filters_hpa300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74ce600-82a3-4ab8-bbca-39fc3feebcf6/kuvavovagobujivowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/716fc681-e9f6-4c1c-b834-46a1a2637240/sony_dream_machine_instructions_icf-c1ipmk2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf77336e-7bed-447b-aef6-d1fffd1d4c10/vobugugufefixopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24661573-5507-41d2-9078-1c3bd267fe51/mukutowadufop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6abc0e-9407-4060-8f28-13eb72430be2/accu-chek_nano_meter_discontinued.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_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 5396 bytes
SHA-256: 6e7ef9164a9865f98dcc1cb25e3af41d5e58820ad8918d038cddaa62b0da98ef
font_01_sfnt_off00010489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 11480 bytes
SHA-256: 69022463ebb02cbdf8db01dd4d1e1df279ea5c88adc9f53fe7f0b41ea9c3bc1e