Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be1730f01c18357…

MALICIOUS

PDF

72.1 KB Created: 2021-01-11 16:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9daa3c21fc91c9986f8bb1e219c4ae01 SHA-1: 21f0020c30f2d9fae0af7c383aa352566dcde3da SHA-256: 2be1730f01c1835746459c5c957f6da95c2237eb97d401adb391a6536d5a020c
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=computer+capsule+pdf+for+nabard In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_5fe9ba1837227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f87db076db4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483388/normal_5fbd6590a584d.pdfIn PDF document text
    • https://site-1176708.mozfiles.com/files/1176708/mobile_car_auto_electrician_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_5fb9f34f690e1.pdfIn PDF document text
    • https://site-1201322.mozfiles.com/files/1201322/kuxut.pdfIn PDF document text
    • https://site-1175642.mozfiles.com/files/1175642/nofitefixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393485/normal_5fcc2ccb683a1.pdfIn PDF document text
    • https://site-1204364.mozfiles.com/files/1204364/alienware_touchpad_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5fad8f6c818d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f88ec7b241ec.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/kotipilesito_kijedum_tewitoxevujal_mojilopeva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446638/normal_5fe2341489ec4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/najubu/newudunepalo.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.

FilenameKindSourceSize
font_00_sfnt_off0000d0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CC 5344 bytes
SHA-256: 73e7b4f8c8d095dd29156cbd9c35aafb5f05ced35bd89637c0c57d851482a85a
font_01_sfnt_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 10908 bytes
SHA-256: 720e086653bd2835d8c08a1027dfefefa9d29c99b262b58a9cd33308d21e6ddc
font_02_sfnt_off000107f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 2832 bytes
SHA-256: d7a1248cabf161ff78a072bd924b98f1b4e551660f4e151c9433689786990c0c

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