Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d07f87e55d5bd8e…

MALICIOUS

PDF

76.3 KB Created: 2021-03-06 07:10:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c1f03ede7e2f5bf5fe14a85d520388eb SHA-1: 0185912fed8871421f3de41927a684a8ffbdbf31 SHA-256: 6d07f87e55d5bd8ebfe4f388f82eeef9dac101a812c52fc65d6c757e3b38f7ef
246 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as a phishing threat. The document body, though partially corrupted, indicates a lure related to recovering a Facebook account, aligning with the 'SE_BRAND_CREDENTIAL_PHISH' heuristic. The embedded URLs likely redirect to a phishing page designed to steal user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wadasowodasi.weebly.com/uploads/1/3/5/3/135316150/71c22e70936b94.pdf.
  • 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://resalured.ru/strik?utm_term=how+to+recover+my+fb+account+from+phishing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489587/normal_6014c8db8d8ee.pdfIn PDF document text
    • http://wikurabafewo.iblogger.org/13504452242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488582/normal_5fdd82c318e44.pdfIn PDF document text
    • http://discount50.pro/dometic_rv_ac_cover7hxk6.pdfIn PDF document text
    • https://wadasowodasi.weebly.com/uploads/1/3/5/3/135316150/71c22e70936b94.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/e89c27a.pdfIn PDF document text
    • https://xipesefilugupab.weebly.com/uploads/1/3/0/7/130740566/83b1b1d.pdfIn PDF document text
    • https://xiwitewikilimav.weebly.com/uploads/1/3/4/3/134371529/1175191.pdfIn PDF document text
    • https://sowovejapa.weebly.com/uploads/1/3/4/7/134709895/kesukumosuxanof_popabiziwu_kezixe.pdfIn PDF document text
    • https://pevarigemi.weebly.com/uploads/1/3/5/3/135303959/9f75ae4fd326d24.pdfIn PDF document text
    • https://navowilupaxit.weebly.com/uploads/1/3/1/3/131381067/4136972.pdfIn PDF document text
    • http://uscreditmonitoring.info/why_is_ancient_greek_pottery_important8n6k7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_eac7a746df524c6db3de973492047b72.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_edd2cda8f7434307a71c74a6cf978cf4.pdf?index=trueIn PDF document text
    • http://vekalaluno.epizy.com/74345028322.pdfIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_8d41199ddc164c82b7ba02668c690249.pdf?index=trueIn PDF document text
    • http://niguroxutoginef.rf.gd/86726394050.pdfIn PDF document text
    • http://molutuganum.epizy.com/infectious_waste_management_a_practical_guide.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_dc42d3a766c24feeb51d53a2a34485f1.pdf?index=trueIn 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_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 5752 bytes
SHA-256: 8fa6a382a01278561b2827700f450575d21f43a71ecfa5c700466deb58dd0e55
font_01_sfnt_off0000ff2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2F 10828 bytes
SHA-256: 243364184ecb2f55c4527e48dcb69972d8bd6642d95617300e0da39f5dd074bf