Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab01e6f0cbf57696…

MALICIOUS

PDF

71.4 KB Created: 2021-03-07 07:36:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0fda2fbbe70dc740974bac4ca14efdb8 SHA-1: a14cebd491b50f8a7e376619f6e04cb8a350b493 SHA-256: ab01e6f0cbf57696ebebd071671a15523e9efa05a3ef62045ef69d00965aaf39
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of embedded URLs and the overall structure point towards a phishing lure designed to trick users into downloading further malicious content or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=detroit+diesel+manual+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464313/normal_604412d061456.pdfIn PDF document text
    • https://jejonogukoji.weebly.com/uploads/1/3/4/8/134864124/busijotalom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492574/normal_60049967c1697.pdfIn PDF document text
    • http://afterdealer.pro/434614287389mzgc.pdfIn PDF document text
    • http://webcam-model.online/how_much_do_public_relations_directors_makef2v60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418185/normal_6002550853ce9.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/cjehjie/96506031016.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/he8mhgj/posuloxirawimaxuj.pdfIn PDF document text
    • https://digakope.weebly.com/uploads/1/3/5/9/135974251/fazamo-miwajib.pdfIn PDF document text
    • http://idealslim-ordina.site/182845961477vvxv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_602b8261900d5.pdfIn PDF document text
    • http://meetporte.xyz/dafufafaduu5m69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_600c3ce49e789.pdfIn PDF document text
    • https://cdn.sqhk.co/demanajinu/hepjggj/xojogavezodumalowowodave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454184/normal_5fcf135b977aa.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/HeBgyji/audio_cutter_and_joiner_software_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464995/normal_5ffe0ae5b8bc6.pdfIn PDF document text
    • http://tcerkovniekupola.space/childrens_stories_i_can_read_onlinej9taq.pdfIn PDF document text
    • https://jibajupo.weebly.com/uploads/1/3/1/6/131636806/lopizalovu.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/xotomisen/modified_semi_block_letter_format_example.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/jofajisebakite.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/nisupakigufapiduvoxor.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_off0000dadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADF 5052 bytes
SHA-256: 98270c61c04e6deee5096962097a785c3c97e71183d8a62aad1f8cb0cc1e919d
font_01_sfnt_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 10240 bytes
SHA-256: 4c0d0896392864f3fc43f7ab6ef5ef160e447ccaca7dd839fcf56c689ad54ba1

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