Malicious PDF — malware analysis report

Static analysis result for SHA-256 0818ddaa07b9e242…

MALICIOUS

PDF

72.9 KB Created: 2021-01-06 12:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b2f41e072390c67d8bbeb05466887cbf SHA-1: 629ba4bce425e1ce9295c24e6eab6e4e6829aef0 SHA-256: 0818ddaa07b9e242611bc785829c0238a7db9667ea4f88507ddcdc80c4dc40c6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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 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://traffnew.ru/aws?utm_term=o+p+d+ka+full+form PDF link annotation
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/jusuwagu.pdfIn PDF document text
    • https://wuwifure.weebly.com/uploads/1/3/4/6/134647121/0aa26f.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/gevafuwabe_mutiverewosuxod_xejiwixewe.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/jhimje3/guess_the_song_2020_kahoot.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/9d2a2f55.pdfIn PDF document text
    • https://merokiniperoj.weebly.com/uploads/1/3/4/6/134691049/renedexaxowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f88988ee93f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419002/normal_5fefd85575b5b.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/pisedij/gerumutifeturakevebafabek.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/zadozajusekaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d5f1fb-e43b-462a-908e-0dea9ef5e27c/40865018483.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/honey_badger_vs_snake.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/wavopuvagi.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/carrum_downs_secondary_college_uniform.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_off0000cbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC1 5100 bytes
SHA-256: 89b1d02294464a13fb1cd68449ebec12ff67be4f56a9ec1d316d59c818c78c56
font_01_sfnt_off0000dd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0C 9704 bytes
SHA-256: 8a300a5c3980cf63a4de0c77258c8b424fc2297e747db1eb3be55e0657623a33
font_02_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 7136 bytes
SHA-256: 1ab5cf3a0ac48acb1e67b3260a5e9827b9167fc2a85c6366a272954148e49c22

Open this report in the interactive analyzer, or submit your own file for analysis.