Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f29ec95c2733032…

MALICIOUS

PDF

75.2 KB Created: 2021-03-31 02:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d0b014eea7b6bfeff426f5df83787581 SHA-1: 51da909ee318bc7ba1a0ed31dbcfdf767fd6f511 SHA-256: 6f29ec95c27330320d20d88a6d60e06ffb2edc843abee8aef1d1b6a2b5edb893
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=lapse+it+pro+apk+free PDF link annotation
    • http://tarigutese.mygamesonline.org/19302838722.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/pajiguwagut-jiluj-tatutufos-zorot.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/bxjfFIk/walinukipovamafizanoxojix.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/xifabosevufutuv_bazenijilulu.pdfIn PDF document text
    • https://sexaximelukifa.weebly.com/uploads/1/3/1/0/131069869/731907.pdfIn PDF document text
    • https://cdn.sqhk.co/pavetikedur/dhhl6Jj/ariel_the_holistic_vocal_coach_dead.pdfIn PDF document text
    • https://fijomenameti.weebly.com/uploads/1/3/0/8/130874411/a9119f17617c1.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/56442455973.pdfIn PDF document text
    • http://topitoxituzoju.iblogger.org/25049977467.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/seluxafawifipojido.pdfIn PDF document text
    • http://lupazul.mywebcommunity.org/razudetugumerozi.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/26796898631.pdfIn PDF document text
    • https://memelixuluxowi.weebly.com/uploads/1/3/5/9/135958522/4433328.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45a7df1-413d-4450-ad3e-8bd8f70319f4/72044879581.pdfIn PDF document text
    • http://redifigikutusoj.myartsonline.com/affairscloud_july_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe54810e-c64f-46ac-afa5-bdfcd478b964/76843406672.pdfIn PDF document text
    • http://titaleze.rf.gd/nifeb.pdfIn PDF document text
    • http://zazupixuwup.rf.gd/browser_opera_beta_apk.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/59336733741.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_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 4868 bytes
SHA-256: a55b8f0d4a21d0efdaab085c8a01e58e070fd46ccf5cd5bc4af0fa0d0b8710e7
font_01_sfnt_off0000fcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 10220 bytes
SHA-256: 724aba9aa037377d84c7dccfc03f24996cd70500bf0c38bca55ed352c891346d

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