Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd09cd084915624b…

MALICIOUS

PDF

86.6 KB Created: 2021-05-21 22:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 03e722798a6c2e6430a6dbe55912f00a SHA-1: 33e33ea2109d08b3ccf628443f3449b54712cb3d SHA-256: fd09cd084915624ba4d97dfd8c4e13b27b6239b46bdfb14c6e82e721398fae1a
222 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to redirector infrastructure, and is flagged by ML classifiers and ClamAV as malicious. The presence of a download button lure and embedded URLs suggests an attempt to direct the user to malicious content or download a payload. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://crophysi.ru/strik?utm_term=hacks+for+counter+blox+roblox+offensive In PDF document text
    • https://static.s123-cdn-static.com/uploads/4402246/normal_5ffc485ad586c.pdfIn PDF document text
    • https://nodudoweg.weebly.com/uploads/1/3/4/5/134599631/pijuzegilavu-peraxota-naruvi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388813/normal_6005c8b90737d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_60489fab8711c.pdfIn PDF document text
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/defikegekuxazu_wiwizejetes_ripedud.pdfIn PDF document text
    • https://beroloxubotuze.weebly.com/uploads/1/3/0/7/130775422/287b0142f33d.pdfIn PDF document text
    • https://wejilosadala.weebly.com/uploads/1/3/0/8/130815097/dosigotarezis.pdfIn PDF document text
    • https://suligabewe.weebly.com/uploads/1/3/4/0/134040343/bazin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_60410268c9c3c.pdfIn PDF document text
    • https://fifubinagate.weebly.com/uploads/1/3/4/8/134854053/kiren.pdfIn PDF document text
    • https://vukekitap.weebly.com/uploads/1/3/1/4/131438073/ed788c1a3cf.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://s3.amazonaws.com/fulosobezur/ada_compliance_checker.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/kaboodle_thermoformed_doors_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/tojisejaput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e39a914-663a-4db1-ba60-31bbfecbc2b5/kitchen_sink_plumbing_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/80515963614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65447ca7-8bb0-426f-b327-c51d7f0e4ca6/20735056182.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/predator_9000_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079d1c79-0f92-4b9f-80f6-133448ebfeab/57036409558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb7a061-4797-46fd-a9e2-cb6edc415599/will_try_my_best_meaning_in_urdu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 5048 bytes
SHA-256: 87b1c2a2833eea1baa5016407af29bd73c367b2e68e688479482b3e803718d61
font_01_sfnt_off00010003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10003 12596 bytes
SHA-256: f0afcaa04050eb5620a846e3686441137eef2094c1368a67c576b3f7e813b9a0
font_02_sfnt_off00012971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12971 16180 bytes
SHA-256: cf8f50b7fe3e18837235b0fa435cdcf20701cf5086b9b5bec02d4afca0c84734
font_03_sfnt_off00013e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333