Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e49cac4870c7d6…

MALICIOUS

PDF

77.0 KB Created: 2021-03-28 22:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e790b05b01863c7086a9f43af5628fcc SHA-1: caa848b3134bed024356b8e175ce66ee66ad29fd SHA-256: 17e49cac4870c7d6d8c0610f3889cc241243791ed89fbe51426b7474495d9dff
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains a string resembling a search query for 'kenmore washer parts', which is directly linked to an external URI hosted on disposable infrastructure. This suggests a phishing or content-luring tactic to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/strik?utm_term=where+can+i+get+kenmore+washer+parts PDF link annotation
    • http://wodedunor.22web.org/27820859405.pdfIn PDF document text
    • http://rijunoje.mygamesonline.org/90537501987.pdfIn PDF document text
    • http://xejitifuwoligaf.mypressonline.com/12709093494.pdfIn PDF document text
    • http://mojofaza.mypressonline.com/miller_and_levine_biology_chapter_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_6044d833ec8b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369797/normal_5fc7a7ffcdfd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412767/normal_5ff13c722ebaf.pdfIn PDF document text
    • http://mesikigodijope.mypressonline.com/mind_mapping_techniques_for_brainstorming.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483851/normal_600140f7e14f7.pdfIn PDF document text
    • http://bisapusid.mypressonline.com/xavonitoxorebemal.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/modurawig.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/alkalosis_and_acidosis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476783/normal_5ffe8e1fae30c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemigososefof.atwebpages.com/biblical_theology_in_the_life_of_the_church.pdfIn PDF document text
    • http://rijonitapadon.myartsonline.com/37461317325.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/chaudhary_charan_singh_university_examination_form.pdfIn PDF document text
    • http://gegurobaz.myartsonline.com/barron_s_sat_subject_test_math_level_2_download_free.pdfIn PDF document text
    • http://safogugeju.epizy.com/53392636804.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/40993811235.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/business_strategy_case_study.pdfIn PDF document text
    • http://kixiwuru.epizy.com/vodikopogo.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/systematic_literature_review_methodology_prisma.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/xukunajula.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_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 5484 bytes
SHA-256: b1ef42a1b01e8b47958405a4e972c31c2b3ea18ce004c3a1835f2a310b8983e2
font_01_sfnt_off0001002e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 11060 bytes
SHA-256: d0ed921a73c9af156d2ae9ba0a756cc50ddf4cb8027462c780344cab4f7c716b