Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e94dca37bf58f8…

MALICIOUS

PDF

114.6 KB Created: 2021-04-19 15:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7a570deb0e9db58223ad121d21f6dfad SHA-1: 27871b71e3a7261b22f0224878ade5828509ba0d SHA-256: e7e94dca37bf58f872823081d1e199d2f22361db66fa21d7076b132b72916e5c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious sites for phishing or malware delivery, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=smc+flex+manual+portugues PDF link annotation
    • http://wozekozexufoxol.scienceontheweb.net/kenmore_washer_repair.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_604ce2b5b70db.pdfIn PDF document text
    • http://xademubizu.sportsontheweb.net/merge_gratuit_tlcharger.pdfIn PDF document text
    • https://raxasowofano.weebly.com/uploads/1/3/2/6/132681821/gemudod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505687/normal_5fcfaf9ab7d95.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/niwetujutar.pdfIn PDF document text
    • http://serarudipiwuvon.mypressonline.com/detailed_project_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_602b6ccbc9011.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/biravej.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/ziwajago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sorogamat/coles_methylated_spirits_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/subiteput.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/binomial_distribution_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/65887659984.pdfIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_c8e74f62f6d54835890d57bc8213f211.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mosezavor/why_is_the_film_called_the_green_mile.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/10236149246.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/vce_exam_simulator_crack_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/xujikufevenawovilu.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_3fc379468a064536ab5c2e110b6c80ce.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16646 5508 bytes
SHA-256: 6c38a1a0c1ae3a216349f66ec3398a36fc8a7b708b9912c9dd083390ce6a0536
font_01_sfnt_off000178ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178EF 14788 bytes
SHA-256: f938851e5e7feae3b4dc42254e48ca44d5eab2beab80f067226eb519724d11f1
font_02_sfnt_off0001a44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A44D 16956 bytes
SHA-256: ed189c24ab1458f66d07bf3b9e17d2893d85e800a782361758cade338779309b

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